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Official data from INPI

PROCESSO PARA A PRODUCAO DE UM CARBONATO DE METAL ALCALINO

Em AnáliseInvention Patent

Application data

Number

PI7804634

Type

Invention Patent

Filing

07/19/1977

Publication

-

Progress at the INPI

  1. Filing07/19/77
  2. Publication
  3. Examination
  4. Allowance03/02/82
  5. Grant
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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

DIAMOND SHAMROCK CORP

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

01/19/1988

RPI 900

Pedido de licença compulsória

#20.1

03/18/1986

RPI 804

20.7

03/11/1986

RPI 803

20.4

03/04/1986

RPI 802

20.4

02/18/1986

RPI 800

Notificação para pagamento de retribuição

#13.1

06/22/1982

RPI 609

Deferimento

#9.1

03/02/1982

RPI 593

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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