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Official data from INPI

PROCESSO PARA A PRODUÇÃO DE GÁS DE SÍNTESE COM UMA RAZÃO H / 2 CO AUMENTADA

Em ExigênciaInvention Patent

Application data

Number

PI8504974

Type

Invention Patent

Filing

10/08/1985

Publication

07/22/1986

Progress at the INPI

  1. Filing10/08/85
  2. Publication07/22/86
  3. Examination07/05/88
  4. Allowance12/26/90
  5. Grant07/30/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 06/13/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

J. G. (pessoa física)

Technical data

IPC Classification

Priority claims

GB

8425620 · 10/10/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

06/13/1989

RPI 973

Solicitação de exame técnico

#4.1

07/05/1988

RPI 924

Publicação do pedido de patente

#3.1

07/22/1986

RPI 822

Pedido de patente depositado

#2.1

12/10/1985

RPI 790

Carta-patente expirada

#21.1

Patente extinta em 08/10/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

07/30/1991

RPI 1078

Notificação para pagamento de retribuição

#13.1

04/09/1991

RPI 1062

Deferimento

#9.1

12/26/1990

RPI 1047

Conhecimento de parecer técnico

#7.1

07/24/1990

RPI 1025

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