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Official data from INPI

PROCESSO PARA REMOÇÃO DE SULFETO DE HIDROGÊNIO DE UMA MISTURA GASOSA

Arquivada/ExtintaInvention Patent

Application data

Number

PI8905377

Type

Invention Patent

Filing

10/23/1989

Publication

05/22/1990

Progress at the INPI

  1. Filing10/23/89
  2. Publication05/22/90
  3. Examination05/26/92
  4. Allowance12/24/96
  5. Grant08/26/97
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 05/21/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

Shell Internationale Research Maatschappij B.V.

NL

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Inventors

J. B. (pessoa física)

NL

W. L. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

8824943.8 · 10/25/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 23/10/2009

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/26/1997

RPI 1395

Deferimento

#9.1

12/24/1996

RPI 1360

Exigência - art. 36 da LPI

#6.1

02/06/1996

RPI 1314

Solicitação de exame técnico

#4.1

05/26/1992

RPI 1121

Publicação do pedido de patente

#3.1

05/22/1990

RPI 1019

Pedido de patente depositado

#2.1

03/27/1990

RPI 1011

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