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BR8601763A - COMPOSITE FILTER IMPROVEMENTS - Google Patents

COMPOSITE FILTER IMPROVEMENTS

Info

Publication number
BR8601763A
BR8601763A BR8601763A BR8601763A BR8601763A BR 8601763 A BR8601763 A BR 8601763A BR 8601763 A BR8601763 A BR 8601763A BR 8601763 A BR8601763 A BR 8601763A BR 8601763 A BR8601763 A BR 8601763A
Authority
BR
Brazil
Prior art keywords
composite filter
filter improvements
composite
filter
Prior art date
Application number
BR8601763A
Other languages
Portuguese (pt)
Inventor
Joao Newton Argolo Rodrigues
Original Assignee
Petroleo Brasileiro Sa
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Petroleo Brasileiro Sa filed Critical Petroleo Brasileiro Sa
Priority to BR8601763A priority Critical patent/BR8601763A/en
Priority to AR87307279A priority patent/AR243258A1/en
Priority to MX607787A priority patent/MX168463B/en
Priority to CA000535092A priority patent/CA1293185C/en
Publication of BR8601763A publication Critical patent/BR8601763A/en

Links

BR8601763A 1986-04-18 1986-04-18 COMPOSITE FILTER IMPROVEMENTS BR8601763A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
BR8601763A BR8601763A (en) 1986-04-18 1986-04-18 COMPOSITE FILTER IMPROVEMENTS
AR87307279A AR243258A1 (en) 1986-04-18 1987-04-13 Composite filter.
MX607787A MX168463B (en) 1986-04-18 1987-04-15 IMPROVEMENTS TO COMPOSITE FILTERS
CA000535092A CA1293185C (en) 1986-04-18 1987-04-21 Compound filters

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BR8601763A BR8601763A (en) 1986-04-18 1986-04-18 COMPOSITE FILTER IMPROVEMENTS

Publications (1)

Publication Number Publication Date
BR8601763A true BR8601763A (en) 1987-11-10

Family

ID=4039893

Family Applications (1)

Application Number Title Priority Date Filing Date
BR8601763A BR8601763A (en) 1986-04-18 1986-04-18 COMPOSITE FILTER IMPROVEMENTS

Country Status (4)

Country Link
AR (1) AR243258A1 (en)
BR (1) BR8601763A (en)
CA (1) CA1293185C (en)
MX (1) MX168463B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117662101B (en) * 2023-11-23 2024-06-07 中国矿业大学 Underground long-distance fracturing-sand injection-logging integrated equipment and method

Also Published As

Publication number Publication date
MX168463B (en) 1993-05-26
CA1293185C (en) 1991-12-17
AR243258A1 (en) 1993-07-30

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Legal Events

Date Code Title Description
B21A Expiry acc. art. 78, item i of ipl- expiry of the term of protection

Free format text: PATENTE EXTINTA EM 18/04/2001