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Official data from INPI

PROCESSO PARA TRATAMENTO DE UM MATERIAL DE ÓXIDO

ConcedidaInvention Patent

Application data

Number

PI8305564

Type

Invention Patent

Filing

10/07/1983

Publication

05/15/1984

Progress at the INPI

  1. Filing10/07/83
  2. Publication05/15/84
  3. Examination07/29/86
  4. Allowance05/09/89
  5. Grant11/28/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Laporte Industries Limited

GB

Inventors

M. R. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8228932 · 10/09/1982

GB

8300473 · 01/08/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/28/1989

RPI 997

Notificação para pagamento de retribuição

#13.1

09/05/1989

RPI 985

Deferimento

#9.1

05/09/1989

RPI 968

Exigência - art. 36 da LPI

#6.1

10/04/1988

RPI 937

6.2

03/04/1987

RPI 854

Solicitação de exame técnico

#4.1

07/29/1986

RPI 823

Publicação do pedido de patente

#3.1

05/15/1984

RPI 708

Pedido de patente depositado

#2.1

12/20/1983

RPI 687

Carta-patente expirada

#21.1

Patente extinta em 07/10/98

07/01/2008

RPI 1956

20.7

04/06/1993

RPI 1166

Pedido de licença compulsória

#20.1

03/30/1993

RPI 1165

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