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Official data from INPI

PROCESSO APERFEIÇOADO PARA TRATAMENTO DE GASES CONTENDO SULFETO DE HIDROGÊNIO

Em AnáliseInvention Patent

Application data

Number

PI7708102

Type

Invention Patent

Filing

12/05/1977

Publication

-

Progress at the INPI

  1. Filing12/05/77
  2. Publication
  3. Examination
  4. Allowance09/18/84
  5. Grant03/26/85
  6. Expired07/06/93

The letters patent expired on 07/06/1993: 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: 08/12/1986. 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

E. W. (pessoa física)

NL

J. V. (pessoa física)

NL

R. G. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

50996/76 · 12/07/1976

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

08/12/1986

RPI 825

Concessão da patente

#16.1

03/26/1985

RPI 753

Notificação para pagamento de retribuição

#13.1

01/15/1985

RPI 743

Deferimento

#9.1

09/18/1984

RPI 726

Exigência - art. 36 da LPI

#6.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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