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Official data from INPI

Processo para preparação de uma solução de controle de mobilidade de recuperação de óleo.

ConcedidaInvention Patent

Application data

Number

PI7907164

Type

Invention Patent

Filing

11/04/1979

Publication

-

Progress at the INPI

  1. Filing11/04/79
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant08/30/83
  6. Expired05/02/95

The letters patent expired on 05/02/1995: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Pfizer, Inc.

US

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Inventors

L. H. (pessoa física)

M. R. (pessoa física)

Technical data

IPC Classification

Priority claims

US

947.895 · 11/06/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

6.2

04/06/1982

RPI 598

Carta-patente expirada

#21.1

05/02/1995

RPI 1274

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