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Official data from INPI

CÉLULA PARA DETERMINAÇÃO DAS TAXAS DE CORROSÃO DE MATERIAIS EM MEIOS CORROSIVOS

Em AnáliseInvention Patent

Application data

Number

PI8604869

Type

Invention Patent

Filing

10/07/1986

Publication

05/31/1988

Progress at the INPI

  1. Filing10/07/86
  2. Publication05/31/88
  3. Examination10/31/89
  4. Allowance11/16/93
  5. Grant06/28/94
  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: 10/31/1989. 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

A. D. (pessoa física)

BR

F. M. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

10/31/1989

RPI 993

Publicação do pedido de patente

#3.1

05/31/1988

RPI 919

Pedido de patente depositado

#2.1

04/07/1987

RPI 859

Carta-patente expirada

#21.1

Patente extinta em 07/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

06/28/1994

RPI 1230

Notificação para pagamento de retribuição

#13.1

03/22/1994

RPI 1216

Deferimento

#9.1

11/16/1993

RPI 1198

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