BR8601763A - Aperfeicoamentos em filtro composto - Google Patents

Aperfeicoamentos em filtro composto

Info

Publication number: BR8601763A
Authority: BR; Brazil
Prior art keywords: composite filter; filter improvements; composite; filter
Prior art date: 1986-04-18

Application number

BR8601763A

Other languages

English (en)

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.)

1986-04-18

Filing date

1986-04-18

Publication date

1987-11-10

1986-04-18 Application filed by Petroleo Brasileiro Sa filed Critical Petroleo Brasileiro Sa

1986-04-18 Priority to BR8601763A priority Critical patent/BR8601763A/pt

1987-04-13 Priority to AR87307279A priority patent/AR243258A1/es

1987-04-15 Priority to MX607787A priority patent/MX168463B/es

1987-04-21 Priority to CA000535092A priority patent/CA1293185C/en

1987-11-10 Publication of BR8601763A publication Critical patent/BR8601763A/pt

Priority Applications (4)

Application Number	Priority Date	Filing Date	Title
BR8601763A BR8601763A (pt)	1986-04-18	1986-04-18	Aperfeicoamentos em filtro composto
AR87307279A AR243258A1 (es)	1986-04-18	1987-04-13	Filtro compuesto
MX607787A MX168463B (es)	1986-04-18	1987-04-15	Mejoras a filtros compuestos
CA000535092A CA1293185C (en)	1986-04-18	1987-04-21	Compound filters

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
BR8601763A BR8601763A (pt)	1986-04-18	1986-04-18	Aperfeicoamentos em filtro composto

Publications (1)

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

Family

ID=4039893

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BR8601763A BR8601763A (pt)	1986-04-18	1986-04-18	Aperfeicoamentos em filtro composto

Country Status (4)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CN117662101B (zh) *	2023-11-23	2024-06-07	中国矿业大学	矿井下长距离压裂-注砂-测井一体化设备及方法

1986
- 1986-04-18 BR BR8601763A patent/BR8601763A/pt not_active IP Right Cessation
1987
- 1987-04-13 AR AR87307279A patent/AR243258A1/es active
- 1987-04-15 MX MX607787A patent/MX168463B/es unknown
- 1987-04-21 CA CA000535092A patent/CA1293185C/en not_active Expired - Lifetime

Also Published As

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

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Legal Events

Date	Code	Title	Description
2008-07-22	B21A	Expiry acc. art. 78, item i of ipl- expiry of the term of protection	Free format text: PATENTE EXTINTA EM 18/04/2001