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Official data from INPI

PROCESSO PARA PRODUZIR PARTÍCULAS INIBIDORAS DE CORROSÃO

Em ExigênciaInvention Patent

Application data

Number

PI8502657

Type

Invention Patent

Filing

06/03/1985

Publication

02/12/1986

Progress at the INPI

  1. Filing06/03/85
  2. Publication02/12/86
  3. Examination02/09/88
  4. Allowance08/21/90
  5. Grant03/26/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 11/14/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

The British Petroleum Company Plc

GB

See this company's full portfolio

Inventors

D. O. (pessoa física)

GB

R. H. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

84 14125 · 06/02/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

11/14/1989

RPI 995

Solicitação de exame técnico

#4.1

02/09/1988

RPI 903

Publicação do pedido de patente

#3.1

02/12/1986

RPI 799

Pedido de patente depositado

#2.1

08/06/1985

RPI 772

Carta-patente expirada

#21.1

Patente extinta em 03/06/2000

07/15/2008

RPI 1958

Republicação - classificação IPC

#15.11

06/11/1991

RPI 1071

Concessão da patente

#16.1

03/26/1991

RPI 1060

Notificação para pagamento de retribuição

#13.1

12/04/1990

RPI 1044

Deferimento

#9.1

08/21/1990

RPI 1029

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