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Official data from INPI

CELULA ELETROLITICA PARA PRODUZIR ALUMINIO (E SISTEMA CONDUTOR DE CATODOS PARA AS MESMAS)

ConcedidaInvention Patent
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Application data

Number

PI8300771

Type

Invention Patent

Filing

02/19/1982

Publication

11/16/1983
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Progress at the INPI

  1. Filing02/19/82
  2. Publication11/16/83
  3. Examination09/25/84
  4. Allowance05/17/88
  5. Grant12/27/88
  6. Terminated10/02/90

The patent was granted on 12/27/1988 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 12/27/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SUMITOMO ALUMINIUM SMELTING CO [JP]

Inventors

K. S. (pessoa física)

U. Y. (pessoa física)

Technical data

IPC Classification

C25C 3/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/27/1988

RPI 949

Notificação para pagamento de retribuição

#13.1

09/06/1988

RPI 933

Deferimento

#9.1

05/17/1988

RPI 917

14.1

10/06/1987

RPI 885

Exigência - art. 36 da LPI

#6.1

04/16/1985

RPI 756

Solicitação de exame técnico

#4.1

09/25/1984

RPI 727

Publicação do pedido de patente

#3.1

11/16/1983

RPI 682

Pedido de patente depositado

#2.1

04/05/1983

RPI 650

Anuidade - prazo legal encerrado

#18.2

10/02/1990

RPI 1035

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