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Official data from INPI

PROCESSO PARA MELHORAR A RECUPERAÇÃO DE PETRÓLEO DE UMA JAZIDA PETROLÍFERA E COMPOSIÇÃO DE ESPUMA PARA INJEÇÃO EM UM RESERVATÓRIO DE PETRÓLEO

PublicadaInvention Patent

Application data

Number

PI8704054

Type

Invention Patent

Filing

08/07/1987

Publication

04/05/1988

Progress at the INPI

Awaiting grant fee payment
  1. Filing08/07/87
  2. Publication04/05/88
  3. Examination10/23/90
  4. Allowance08/01/95
  5. Grant
  6. In force

The application was allowed by the INPI on 08/01/1995. The grant of the letters patent is being processed.

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Latest action published by the INPI: 04/05/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Chevron Research Company

US

See this company's full portfolio

Inventors

S. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

895.664 · 08/11/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/05/1988

RPI 911

Pedido de patente depositado

#2.1

11/17/1987

RPI 891

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/00; C11D 1/12; E21B 43/22.

03/27/2018

RPI 2464

Retificação

#15.3

01/09/1996

RPI 1310

Deferimento

#9.1

08/01/1995

RPI 1287

Exigência - art. 36 da LPI

#6.1

01/25/1994

RPI 1208

Solicitação de exame técnico

#4.1

10/23/1990

RPI 1038

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