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Official data from INPI

PROCESSO E APARELHO PARA LIMPEZA DE ÂNODOS EMPREGADOS EM ELETRÓLISE DE SAL EM FUSÃO

Em AnáliseInvention Patent

Application data

Number

PI8404158

Type

Invention Patent

Filing

08/16/1984

Publication

07/16/1985

Progress at the INPI

  1. Filing08/16/84
  2. Publication07/16/85
  3. Examination01/28/86
  4. Allowance01/09/90
  5. Grant08/28/90
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hoogovens Aluminium GmbH

DE

Inventors

H. B. (pessoa física)

DE

Technical data

IPC Classification

Priority claims

DE

P 33 29 736.3 · 08/17/1983

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.1

07/04/1989

RPI 976

Exigência - art. 36 da LPI

#6.1

01/03/1989

RPI 950

6.2

07/26/1988

RPI 927

Solicitação de exame técnico

#4.1

01/28/1986

RPI 797

Publicação do pedido de patente

#3.1

07/16/1985

RPI 769

Pedido de patente depositado

#2.1

10/23/1984

RPI 731

Carta-patente expirada

#21.1

Patente extinta em 16/08/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

08/28/1990

RPI 1030

Notificação para pagamento de retribuição

#13.1

05/01/1990

RPI 1016

Deferimento

#9.1

01/09/1990

RPI 1001

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