DK171158B1 - Fremgangsmåde til fremstilling af diatoméjord-baserede filtreringsmidler med meget lavt indhold af cristobalit ved agglomerering - Google Patents
Fremgangsmåde til fremstilling af diatoméjord-baserede filtreringsmidler med meget lavt indhold af cristobalit ved agglomerering Download PDFInfo
- Publication number
- DK171158B1 DK171158B1 DK132094A DK132094A DK171158B1 DK 171158 B1 DK171158 B1 DK 171158B1 DK 132094 A DK132094 A DK 132094A DK 132094 A DK132094 A DK 132094A DK 171158 B1 DK171158 B1 DK 171158B1
- Authority
- DK
- Denmark
- Prior art keywords
- diatomaceous earth
- silicic acid
- agglomeration
- silica
- calcination
- Prior art date
Links
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 title claims description 137
- 239000005909 Kieselgur Substances 0.000 title claims description 53
- 239000003795 chemical substances by application Substances 0.000 title claims description 42
- 238000001914 filtration Methods 0.000 title claims description 34
- 238000000034 method Methods 0.000 title claims description 19
- 230000008569 process Effects 0.000 title claims description 17
- 238000005054 agglomeration Methods 0.000 title description 31
- 230000002776 aggregation Effects 0.000 title description 31
- 229910052906 cristobalite Inorganic materials 0.000 title description 19
- 238000002360 preparation method Methods 0.000 title description 6
- 235000012239 silicon dioxide Nutrition 0.000 claims description 49
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 43
- 238000001354 calcination Methods 0.000 claims description 25
- 239000004115 Sodium Silicate Substances 0.000 claims description 13
- 229920005989 resin Polymers 0.000 claims description 13
- 239000011347 resin Substances 0.000 claims description 13
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 13
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 8
- 239000000203 mixture Substances 0.000 claims description 8
- 125000002091 cationic group Chemical group 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 5
- 229910052910 alkali metal silicate Inorganic materials 0.000 claims description 3
- 238000005342 ion exchange Methods 0.000 claims description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 40
- 239000000047 product Substances 0.000 description 33
- 239000000377 silicon dioxide Substances 0.000 description 26
- 239000011230 binding agent Substances 0.000 description 20
- 229910052742 iron Inorganic materials 0.000 description 19
- 230000035699 permeability Effects 0.000 description 19
- 239000000243 solution Substances 0.000 description 15
- 239000004927 clay Substances 0.000 description 11
- 238000000227 grinding Methods 0.000 description 10
- 238000002156 mixing Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 239000011734 sodium Substances 0.000 description 7
- 239000000440 bentonite Substances 0.000 description 6
- 229910000278 bentonite Inorganic materials 0.000 description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 6
- 239000012535 impurity Substances 0.000 description 6
- 241000206761 Bacillariophyta Species 0.000 description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 5
- 229920001429 chelating resin Polymers 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 229910002026 crystalline silica Inorganic materials 0.000 description 4
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 229910052905 tridymite Inorganic materials 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000005995 Aluminium silicate Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 235000012211 aluminium silicate Nutrition 0.000 description 3
- 229960000892 attapulgite Drugs 0.000 description 3
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 229910052681 coesite Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005470 impregnation Methods 0.000 description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 3
- 238000003801 milling Methods 0.000 description 3
- 229910052625 palygorskite Inorganic materials 0.000 description 3
- 150000004760 silicates Chemical class 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 229910052682 stishovite Inorganic materials 0.000 description 3
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920002125 Sokalan® Polymers 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 235000013405 beer Nutrition 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000008119 colloidal silica Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000036961 partial effect Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910000029 sodium carbonate Inorganic materials 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 241000972773 Aulopiformes Species 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-M Bisulfite Chemical compound OS([O-])=O LSNNMFCWUKXFEE-UHFFFAOYSA-M 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241000282994 Cervidae Species 0.000 description 1
- 206010010774 Constipation Diseases 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 208000019693 Lung disease Diseases 0.000 description 1
- 229910014142 Na—O Inorganic materials 0.000 description 1
- 206010028980 Neoplasm Diseases 0.000 description 1
- 239000004111 Potassium silicate Substances 0.000 description 1
- 201000010001 Silicosis Diseases 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- 201000011510 cancer Diseases 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 231100000315 carcinogenic Toxicity 0.000 description 1
- 239000003183 carcinogenic agent Substances 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000013058 crude material Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000007857 degradation product Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000010981 drying operation Methods 0.000 description 1
- 238000001493 electron microscopy Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000002386 leaching Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920001467 poly(styrenesulfonates) Polymers 0.000 description 1
- IWZKICVEHNUQTL-UHFFFAOYSA-M potassium hydrogen phthalate Chemical compound [K+].OC(=O)C1=CC=CC=C1C([O-])=O IWZKICVEHNUQTL-UHFFFAOYSA-M 0.000 description 1
- 229910052913 potassium silicate Inorganic materials 0.000 description 1
- NNHHDJVEYQHLHG-UHFFFAOYSA-N potassium silicate Chemical compound [K+].[K+].[O-][Si]([O-])=O NNHHDJVEYQHLHG-UHFFFAOYSA-N 0.000 description 1
- 235000019353 potassium silicate Nutrition 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000011253 protective coating Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 235000019515 salmon Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 125000005624 silicic acid group Chemical group 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/02—Loose filtering material, e.g. loose fibres
- B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
- B01J20/14—Diatomaceous earth
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Analytical Chemistry (AREA)
- Organic Chemistry (AREA)
- Solid-Sorbent Or Filter-Aiding Compositions (AREA)
- Filtering Materials (AREA)
- Distillation Of Fermentation Liquor, Processing Of Alcohols, Vinegar And Beer (AREA)
- Catalysts (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9313862A FR2712508B1 (fr) | 1993-11-19 | 1993-11-19 | Procédé pour l'obtention d'agents filtrants diatomitiques à très faible teneur en cristobalite par agglomération avec des liants silicatés ou siliciques et agents filtrants correspondants. |
| FR9313862 | 1993-11-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DK132094A DK132094A (da) | 1995-05-20 |
| DK171158B1 true DK171158B1 (da) | 1996-07-08 |
Family
ID=9453047
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DK132094A DK171158B1 (da) | 1993-11-19 | 1994-11-18 | Fremgangsmåde til fremstilling af diatoméjord-baserede filtreringsmidler med meget lavt indhold af cristobalit ved agglomerering |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US5710090A (is) |
| JP (1) | JP2547390B2 (is) |
| AU (1) | AU665318B2 (is) |
| CA (1) | CA2135042C (is) |
| DE (1) | DE4440931C2 (is) |
| DK (1) | DK171158B1 (is) |
| ES (1) | ES2105951B1 (is) |
| FR (1) | FR2712508B1 (is) |
| IS (1) | IS1693B (is) |
| IT (1) | IT1267153B1 (is) |
| ZA (1) | ZA949142B (is) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5776353A (en) * | 1996-02-16 | 1998-07-07 | Advanced Minerals Corporation | Advanced composite filtration media |
| DE10022798C2 (de) * | 2000-05-10 | 2003-07-03 | Pfleiderer Ag | Körniges, keramisches Material mit hoher Porosität, Verfahren zu seiner Herstellung und Verwendung des Materials |
| DE20122792U1 (de) * | 2001-02-13 | 2007-10-11 | Lehmann & Voss & Co. Kg | Filterhilfsmittel |
| DE10235866B4 (de) * | 2002-08-05 | 2005-02-24 | Technische Universität München | Verfahren zur thermischen Behandlung von Kieselgur, thermisch behandelte Kieselgur und Verwendung einer derartigen Kieselgur |
| WO2008008940A2 (en) * | 2006-07-14 | 2008-01-17 | World Minerals, Inc. | Composition for filtering and removing particles and/or constituents from a fluid |
| US20100167921A1 (en) * | 2006-09-06 | 2010-07-01 | World Minerals, Inc. | Process for Roasting Diatomaceous Earth Ore to Reduce Organic Content |
| WO2008131124A1 (en) * | 2007-04-18 | 2008-10-30 | World Minerals, Inc. | Calcined diatomite products with low cristobalite content |
| US8084392B2 (en) * | 2007-07-06 | 2011-12-27 | Ep Minerals, Llc | Crystalline silica-free diatomaceous earth filter aids and methods of manufacturing the same |
| US20090181848A1 (en) * | 2007-07-06 | 2009-07-16 | Ep Minerals, Llc | Crystalline silica-free diatomaceous earth blended filter aids and methods of manufacturing the same |
| WO2009067718A1 (en) * | 2007-11-25 | 2009-05-28 | World Minerals, Inc. | Filter aids made from low permeability diatomites |
| WO2010036763A1 (en) * | 2008-09-26 | 2010-04-01 | World Minerals Inc. | Diatomaceous earth products containing reduced soluble metal levels, processes for reducing soluble metal levels in diatomaceous earth products, and methods of using the same |
| US20110195168A1 (en) * | 2008-10-09 | 2011-08-11 | World Minerals, Inc. | Diatomaceous earth products, processes for preparing them, and methods of their use |
| JP5988975B2 (ja) * | 2010-08-18 | 2016-09-07 | アイメリーズ フィルトレーション ミネラルズ，インコーポレイテッド | 新規性のある細孔サイズ特性を有する複合濾過補助剤 |
| EP2794056A4 (en) * | 2011-12-21 | 2015-08-19 | Imerys Filtration Minerals Inc | KIESELGURPRODUKTE, METHOD FOR THE PRODUCTION THEREOF AND METHOD FOR THE USE THEREOF |
| US9095842B2 (en) | 2012-12-13 | 2015-08-04 | Ep Minerals, Llc | Diatomaceous earth filter aid containing a low crystalline silica content |
| JP2016514667A (ja) * | 2013-04-11 | 2016-05-23 | イーピー ミネラルズ, エルエルシーEp Minerals, Llc | 結晶シリカが低減された珪藻土製品及びその製造方法 |
| JP6783234B2 (ja) | 2014-12-19 | 2020-11-11 | イーピー ミネラルス，エルエルシー | オパール質の生物起源シリカ／膨張パーライト複合製品 |
| CA2999254A1 (en) * | 2015-10-23 | 2017-04-27 | Ep Minerals, Llc | Diatomite products |
| CN108502892A (zh) * | 2018-05-30 | 2018-09-07 | 浙江省医学科学院 | 一种用于复制矽肺模型的标准石英粉尘的制备方法 |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR907690A (fr) * | 1944-11-07 | 1946-03-19 | Transmission mécanique pour engins de locomotion de grande puissance | |
| US2693456A (en) * | 1950-09-11 | 1954-11-02 | Eagle Picher Co | Treatment of diatomaceous earth |
| GB949724A (en) * | 1961-07-28 | 1964-02-19 | Johns Manville | Method of producing calcined diatomaceous earth |
| US3392507A (en) * | 1964-12-02 | 1968-07-16 | Johns Manville | Preparation of a support for use in gas chromatography |
| US3600329A (en) * | 1967-10-30 | 1971-08-17 | Kieselguhr De Mexico Sa | Diatomaceous earth treated with poly-electrolyte product and a new process for producing it |
| DE6753120U (de) * | 1968-07-19 | 1969-04-03 | Klaus Teske | Kieselgur das als filterhilfsmittel verwendet wird, durch ein geeignetes bindemittel zu koerpern zu pressen. |
| US4134857A (en) * | 1977-02-07 | 1979-01-16 | Johns-Manville Corporation | Use of tannic or gallic acid to produce low beverage soluble iron content filter aid |
| US4581338A (en) * | 1985-05-31 | 1986-04-08 | Manville Service Corporation | Preparation of catalyst supports and materials produced thereby |
| DD252080A3 (de) * | 1985-08-30 | 1987-12-09 | Wtoz Der Brau Und Malzindustri | Verfahren zur substanzschonenden und strukturerhaltenden aufbereitung von diatomeenerde zur gewinnung vorausbestimmbarer mengen von kieselgut |
| DE3621801A1 (de) * | 1986-06-28 | 1988-01-07 | Franz Josef Siepe | Verfahren zum plombieren und verschliessen von fuell- bzw. ausgussstutzen an behaeltern und behaelterverschluss |
| DD266034A1 (de) * | 1987-11-16 | 1989-03-22 | Wtoez Brau & Malzind | Verfahren zum dispersen, strukturbewahrenden korngroessensichernden kalzinieren von kieselgur |
| JPH0745004B2 (ja) * | 1989-11-02 | 1995-05-17 | 昭次 園川 | 濾過材 |
| FR2663564B1 (fr) * | 1990-06-20 | 1992-10-02 | Ceca Sa | Procede pour l'obtention d'agents filtrants diatomiques calcines tres permeables exempts de cristobalite, et agents filtrants diatomitiques calcines tres permeables exempts de cristobalite. |
| US5403799A (en) * | 1992-12-21 | 1995-04-04 | W. R. Grace & Co.-Conn. | Process upset-resistant inorganic supports for bioremediation |
-
1993
- 1993-11-19 FR FR9313862A patent/FR2712508B1/fr not_active Expired - Lifetime
-
1994
- 1994-11-03 CA CA002135042A patent/CA2135042C/fr not_active Expired - Fee Related
- 1994-11-15 IS IS4234A patent/IS1693B/is unknown
- 1994-11-16 AU AU78837/94A patent/AU665318B2/en not_active Expired
- 1994-11-17 DE DE4440931A patent/DE4440931C2/de not_active Expired - Lifetime
- 1994-11-17 ZA ZA949142A patent/ZA949142B/xx unknown
- 1994-11-18 US US08/343,979 patent/US5710090A/en not_active Expired - Fee Related
- 1994-11-18 ES ES09402368A patent/ES2105951B1/es not_active Expired - Fee Related
- 1994-11-18 IT IT94TO000928A patent/IT1267153B1/it active IP Right Grant
- 1994-11-18 DK DK132094A patent/DK171158B1/da not_active IP Right Cessation
- 1994-11-21 JP JP6311171A patent/JP2547390B2/ja not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| ES2105951B1 (es) | 1998-07-01 |
| ES2105951A1 (es) | 1997-10-16 |
| IT1267153B1 (it) | 1997-01-28 |
| CA2135042C (fr) | 1999-04-20 |
| ZA949142B (en) | 1995-07-24 |
| CA2135042A1 (fr) | 1995-05-20 |
| JPH07265693A (ja) | 1995-10-17 |
| DK132094A (da) | 1995-05-20 |
| US5710090A (en) | 1998-01-20 |
| IS4234A (is) | 1995-05-20 |
| DE4440931A1 (de) | 1995-05-24 |
| FR2712508B1 (fr) | 1996-01-05 |
| DE4440931C2 (de) | 1999-11-25 |
| ITTO940928A0 (it) | 1994-11-18 |
| AU665318B2 (en) | 1995-12-21 |
| IS1693B (is) | 1998-04-20 |
| ITTO940928A1 (it) | 1996-05-18 |
| JP2547390B2 (ja) | 1996-10-23 |
| FR2712508A1 (fr) | 1995-05-24 |
| AU7883794A (en) | 1995-05-25 |
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| Date | Code | Title | Description |
|---|---|---|---|
| B1 | Patent granted (law 1993) | ||
| PUP | Patent expired |
Expiry date: 20141118 |