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Official data from INPI

PROCESSO PARA EXTRACAO DE AGUA PESADO DE CORRENTES DE HIDROGENIO NAO ELETROLITICO,USANDO UM PROCESSO DE TROCA DE AGUA PESADA COMBINADO ELETROLITICO E CATALITICO

Em AnáliseInvention Patent

Application data

Number

PI7901918

Type

Invention Patent

Filing

03/30/1978

Publication

-

Progress at the INPI

  1. Filing03/30/78
  2. Publication
  3. Examination
  4. Allowance08/09/83
  5. Grant02/28/84
  6. Expired06/21/94

The letters patent expired on 06/21/1994: 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: 09/30/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ELECTROLYSER CORP LTD

NORANDA MINES LTD

Inventors

B. J. (pessoa física)

H. M. (pessoa física)

L. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.7

09/30/1986

RPI 832

20.4

09/23/1986

RPI 831

Cessão de direito de exploração

#22.1

06/04/1985

RPI 763

Concessão da patente

#16.1

02/28/1984

RPI 697

Notificação para pagamento de retribuição

#13.1

11/29/1983

RPI 684

Deferimento

#9.1

08/09/1983

RPI 668

Exigência - art. 36 da LPI

#6.1

06/01/1982

RPI 606

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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