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Official data from INPI

APERFEIÇOAMENTO EM FILTRO COMPOSTO

Em AnáliseInvention Patent

Application data

Number

PI8703386

Type

Invention Patent

Filing

07/03/1987

Publication

01/17/1989

Progress at the INPI

  1. Filing07/03/87
  2. Publication01/17/89
  3. Examination05/30/89
  4. Allowance05/28/91
  5. Grant03/31/92
  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.

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Latest action published by the INPI: 05/30/1989. 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

J. R. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/30/1989

RPI 971

Publicação do pedido de patente

#3.1

01/17/1989

RPI 952

Pedido de patente depositado

#2.1

09/29/1987

RPI 884

Carta-patente expirada

#21.1

Patente extinta em 03/07/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

03/31/1992

RPI 1113

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

12/26/1990

RPI 1047

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