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Official data from INPI

PROCESSO PARA PRODUCAO DE UM CARBONATO DE METAL ALCALINO EM UMA CELULA ELETROLITICA

Em AnáliseInvention Patent

Application data

Number

PI7600351

Type

Invention Patent

Filing

07/19/1976

Publication

-

Progress at the INPI

  1. Filing07/19/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 12/15/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DIAMOND SHAMROCK CORP

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Inventors

D. D. (pessoa física)

H. C. (pessoa física)

O. K. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

12/15/1987

RPI 895

20.4

12/23/1986

RPI 844

Pedido de licença compulsória

#20.1

06/17/1986

RPI 817

20.7

06/17/1986

RPI 817

20.4

06/03/1986

RPI 815

Concessão da patente

#16.1

12/29/1981

RPI 584

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

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