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Official data from INPI

CÉLULA PARA A PRODUÇÃO DE ALUMÍNIO ATRAVÉS DA ELETRÓLISE DE UM ELETRÓLITO CONTENDO ALUMINA À BASE DE CRIOLITA EM FUSÃO

DeferidaInvention Patent

Application data

Number

PI8402855

Type

Invention Patent

Filing

06/12/1984

Publication

05/21/1985

Progress at the INPI

  1. Filing06/12/84
  2. Publication05/21/85
  3. Examination08/12/86
  4. Allowance12/12/89
  5. Grant05/29/90
  6. Terminated06/13/95

The patent was granted on 05/29/1990 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: 12/12/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Alcan International Limited

CA

See this company's full portfolio

Inventors

E. D. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

GB

8316058 · 06/13/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

12/12/1989

RPI 999

Exigência - art. 36 da LPI

#6.1

09/05/1989

RPI 985

Conhecimento de parecer técnico

#7.1

04/11/1989

RPI 964

6.2

08/02/1988

RPI 928

Solicitação de exame técnico

#4.1

08/12/1986

RPI 825

Publicação do pedido de patente

#3.1

05/21/1985

RPI 761

Pedido de patente depositado

#2.1

08/14/1984

RPI 721

Anuidade - prazo legal encerrado

#18.2

06/13/1995

RPI 1280

Concessão da patente

#16.1

05/29/1990

RPI 1020

Notificação para pagamento de retribuição

#13.1

04/17/1990

RPI 1014

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