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Official data from INPI

PROCESSO PARA A RECUPERAÇÃO DE TUNGSTÊNIO DE PEDAÇOS DE MATERIAL CONTENDO LIGA DE TUNGSTÊNIO

Em AnáliseInvention Patent

Application data

Number

PI8601398

Type

Invention Patent

Filing

03/26/1986

Publication

12/09/1986

Progress at the INPI

  1. Filing03/26/86
  2. Publication12/09/86
  3. Examination01/24/89
  4. Allowance03/03/92
  5. Grant10/27/92
  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: 01/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Interox Chemicals Limited, companhia britânica

GB

See this company's full portfolio

Inventors

D. H. (pessoa física)

GB

D. A. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8508334 · 03/29/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

01/24/1989

RPI 953

Publicação do pedido de patente

#3.1

12/09/1986

RPI 842

Pedido de patente depositado

#2.1

10/21/1986

RPI 835

Carta-patente expirada

#21.1

Patente extinta em 26/03/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

10/27/1992

RPI 1143

Notificação para pagamento de retribuição

#13.1

07/28/1992

RPI 1130

Deferimento

#9.1

03/03/1992

RPI 1109

Conhecimento de parecer técnico

#7.1

07/30/1991

RPI 1078

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