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Official data from INPI

CÉLULA DE REDUÇÃO ELETROLÍTICA PARA PRODUÇÃO DE ALUMÍNIO

ConcedidaInvention Patent

Application data

Number

PI8302821

Type

Invention Patent

Filing

05/27/1983

Publication

01/24/1984

Progress at the INPI

  1. Filing05/27/83
  2. Publication01/24/84
  3. Examination07/30/85
  4. Allowance05/09/89
  5. Grant10/24/89
  6. Terminated04/25/95

The patent was granted on 10/24/1989 and later terminated for failure to pay the annuities. The technology is in the public domain 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

J. M. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

GB

8215728 · 05/28/1982

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

09/05/1989

RPI 985

Deferimento

#9.1

05/09/1989

RPI 968

Conhecimento de parecer técnico

#7.1

09/27/1988

RPI 936

6.2

03/04/1987

RPI 854

Solicitação de exame técnico

#4.1

07/30/1985

RPI 771

Publicação do pedido de patente

#3.1

01/24/1984

RPI 692

Pedido de patente depositado

#2.1

07/12/1983

RPI 664

Anuidade - prazo legal encerrado

#18.2

04/25/1995

RPI 1273

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