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Official data from INPI

PROCESSO E CELULA PARA PRODUZIR MAGNESIO POR ELETROLISE

Em AnáliseInvention Patent

Application data

Number

PI7607478

Type

Invention Patent

Filing

11/10/1975

Publication

-

Progress at the INPI

  1. Filing11/10/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/27/82
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ALCAN RES & DEV

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Inventors

S. O. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

18.8

01/19/1988

RPI 900

Anuidade - prazo legal encerrado

#18.2

11/24/1987

RPI 892

Concessão da patente

#16.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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