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Official data from INPI

PROCESSO PARA A REMOÇÃO DE H S DE UMA CORRENTE GASOSA ÁCIDA

Em AnáliseInvention Patent

Application data

Number

PI8603981

Type

Invention Patent

Filing

08/21/1986

Publication

04/07/1987

Progress at the INPI

  1. Filing08/21/86
  2. Publication04/07/87
  3. Examination05/23/89
  4. Allowance10/26/93
  5. Grant05/31/94
  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: 05/23/1989. 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

D. O. (pessoa física)

US

G. B. (pessoa física)

US

J. (. (pessoa física)

US

Z. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

769.195 · 08/23/1985

US

769.196 · 08/23/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

05/23/1989

RPI 970

Publicação do pedido de patente

#3.1

04/07/1987

RPI 859

Pedido de patente depositado

#2.1

03/17/1987

RPI 856

Carta-patente expirada

#21.1

Patente extinta em 21/08/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

05/31/1994

RPI 1226

Deferimento

#9.1

10/26/1993

RPI 1195

Exigência - art. 36 da LPI

#6.1

04/13/1993

RPI 1167

11.8

11/17/1992

RPI 1146

Arquivamento - Art. 36 §1° da LPI

#11.2

12/17/1991

RPI 1098

Exigência - art. 36 da LPI

#6.1

05/28/1991

RPI 1069

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