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Official data from INPI

PROCESSO APERFEIÇOADO PARA ULTERIOR PROCESSAMENTO DEM GASES CONTENDO SULFETO DE HIDROGÊNIO

ConcedidaInvention Patent

Application data

Number

PI7903127

Type

Invention Patent

Filing

05/21/1979

Publication

-

Progress at the INPI

  1. Filing05/21/79
  2. Publication
  3. Examination01/05/82
  4. Allowance03/13/84
  5. Grant09/25/84
  6. Expired07/26/94

The letters patent expired on 07/26/1994: 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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

C. O. (pessoa física)

E. W. (pessoa física)

NL

R. C. (pessoa física)

Technical data

IPC Classification

Priority claims

NL

7805550 · 05/23/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

07/03/1984

RPI 715

Deferimento

#9.1

03/13/1984

RPI 699

Exigência - art. 36 da LPI

#6.1

11/01/1983

RPI 680

Republicação - classificação IPC

#15.11

05/24/1983

RPI 657

Exigência - art. 36 da LPI

#6.1

03/15/1983

RPI 647

Pedido de certificado de adição de invenção

#5.1

06/01/1982

RPI 606

Solicitação de exame técnico

#4.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

07/26/1994

RPI 1234

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