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Official data from INPI

PROCESSO DE ESTIMULAÇÃO DE FORMAÇÕES PRODUTORAS DE HIDRACARBONETOS

PublicadaInvention Patent

Application data

Number

PI8706561

Type

Invention Patent

Filing

12/04/1987

Publication

07/04/1989

Progress at the INPI

  1. Filing12/04/87
  2. Publication07/04/89
  3. Examination
  4. Allowance05/10/94
  5. Grant01/31/95
  6. Expired07/29/08

The letters patent expired on 07/29/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Petróleo Brasileiro S/A - Petrobrás

RJ, BR

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Inventors

C. K. (pessoa física)

BR

Z. F. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/04/1989

RPI 976

Pedido de patente depositado

#2.1

04/12/1988

RPI 912

Carta-patente expirada

#21.1

Patente extinta em 04/12/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

01/31/1995

RPI 1261

Notificação para pagamento de retribuição

#13.1

09/27/1994

RPI 1243

Deferimento

#9.1

05/10/1994

RPI 1223

Exigência - art. 36 da LPI

#6.1

02/16/1994

RPI 1211

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