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Official data from INPI

PROCESSO PARA A REMOÇÃO DE GASES ÁCIDOS DE UMA MISTURA GASOSA

ConcedidaInvention Patent
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Application data

Number

PI7901719

Type

Invention Patent

Filing

03/20/1979

Publication

-
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Progress at the INPI

  1. Filing03/20/79
  2. Publication
  3. Examination11/03/81
  4. Allowance01/15/85
  5. Grant07/30/85
  6. Expired06/21/94

The letters patent expired on 06/21/1994: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 07/30/1985. 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)

R. C. (pessoa física)

Technical data

IPC Classification

C10G 21/20

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/30/1985

RPI 771

Notificação para pagamento de retribuição

#13.1

05/07/1985

RPI 759

Deferimento

#9.1

01/15/1985

RPI 743

Exigência - art. 36 da LPI

#6.1

05/02/1984

RPI 706

Exigência - art. 36 da LPI

#6.1

11/16/1983

RPI 682

6.2

06/22/1982

RPI 609

Pedido de certificado de adição de invenção

#5.1

04/20/1982

RPI 600

Solicitação de exame técnico

#4.1

11/03/1981

RPI 576

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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