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Official data from INPI

FERRAMENTA DE LIMPEZA PARA POÇOS DE PRODUÇÃO

PublicadaInvention Patent

Application data

Number

PI8606404

Type

Invention Patent

Filing

12/23/1986

Publication

07/12/1988

Progress at the INPI

  1. Filing12/23/86
  2. Publication07/12/88
  3. Examination01/02/90
  4. Allowance05/28/91
  5. Grant02/04/92
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 07/12/1988. 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

F. C. (pessoa física)

BR

J. A. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/12/1988

RPI 925

Pedido de patente depositado

#2.1

04/28/1987

RPI 862

Carta-patente expirada

#21.1

Patente extinta em 23/12/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

02/04/1992

RPI 1105

Notificação para pagamento de retribuição

#13.1

09/10/1991

RPI 1084

Deferimento

#9.1

05/28/1991

RPI 1069

Conhecimento de parecer técnico

#7.1

11/27/1990

RPI 1043

Solicitação de exame técnico

#4.1

01/02/1990

RPI 1000

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