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Official data from INPI

PROCESSO PARA REMOÇÃO DE SULFETO DE HIDROGÊNIO DE UM GÁS CONTAMINADO

PublicadaInvention Patent

Application data

Number

PI8605245

Type

Invention Patent

Filing

10/28/1986

Publication

07/28/1987

Progress at the INPI

  1. Filing10/28/86
  2. Publication07/28/87
  3. Examination03/01/90
  4. Allowance08/02/94
  5. Grant03/28/95
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 07/28/1987. 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. C. (pessoa física)

GB

E. O. (pessoa física)

GB

S. M. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8526743 · 10/30/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/28/1987

RPI 875

Pedido de patente depositado

#2.1

04/07/1987

RPI 859

Carta-patente expirada

#21.1

Patente extinta em 28/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

03/28/1995

RPI 1269

Notificação para pagamento de retribuição

#13.1

11/29/1994

RPI 1252

Deferimento

#9.1

08/02/1994

RPI 1235

Conhecimento de parecer técnico

#7.1

02/22/1994

RPI 1212

15.17

04/24/1990

RPI 1015

15.9

03/01/1990

RPI 1007

Solicitação de exame técnico

#4.1

03/01/1990

RPI 1007

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