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Official data from INPI

PROCESSO PARA HIDROCONVERSAO DE CARVAO PARA DAR UM OLEO,E CATALISTADOR DE HIDROCONVERSAO

ConcedidaInvention Patent

Application data

Number

PI7704252

Type

Invention Patent

Filing

07/02/1976

Publication

-

Progress at the INPI

  1. Filing07/02/76
  2. Publication
  3. Examination
  4. Allowance12/13/83
  5. Grant05/29/84
  6. Expired07/13/93

The letters patent expired on 07/13/1993: 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: 05/29/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

EXXON RESEARCH ENGINEERING CO

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Inventors

A. C. (pessoa física)

B. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/29/1984

RPI 710

Notificação para pagamento de retribuição

#13.1

04/10/1984

RPI 703

Deferimento

#9.1

12/13/1983

RPI 686

15.0

01/12/1982

RPI 586

Carta-patente expirada

#21.1

07/13/1993

RPI 1180

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