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Official data from INPI

CÉLULA ELETROLÍTICA E PROCESSO PARA PRODUÇÃO DE METAL POR ELETRÓLISE DE UM ELETRÓLITO

ConcedidaInvention Patent

Application data

Number

PI8304222

Type

Invention Patent

Filing

08/05/1983

Publication

03/13/1984

Progress at the INPI

  1. Filing08/05/83
  2. Publication03/13/84
  3. Examination10/15/85
  4. Allowance04/25/89
  5. Grant10/24/89
  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: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alcan International Limited

CA

See this company's full portfolio

Inventors

O. S. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8222665 · 08/06/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/24/1989

RPI 992

Notificação para pagamento de retribuição

#13.1

08/22/1989

RPI 983

Deferimento

#9.1

04/25/1989

RPI 966

Exigência - art. 36 da LPI

#6.1

09/13/1988

RPI 934

6.2

03/04/1987

RPI 854

Solicitação de exame técnico

#4.1

10/15/1985

RPI 782

Publicação do pedido de patente

#3.1

03/13/1984

RPI 699

Pedido de patente depositado

#2.1

10/18/1983

RPI 678

Carta-patente expirada

#21.1

Patente extinta em 05/08/98

07/01/2008

RPI 1956

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