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Official data from INPI

PROCESSO PARA A PREPARAÇÃO DE SULFONATOS DE OLEFINAS INTERNAS.

Prazo de SigiloInvention Patent

Application data

Number

PI8903537

Type

Invention Patent

Filing

07/18/1989

Publication

03/13/1990

Progress at the INPI

  1. Filing07/18/89
  2. Publication03/13/90
  3. Examination03/31/92
  4. Allowance11/03/98
  5. Grant10/19/99
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 11/07/1989. 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

J. S. (pessoa física)

NL

R. G. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

8817293.7 · 07/20/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/07/1989

RPI 994

Carta-patente expirada

#21.1

Patente extinta em 19/10/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

10/19/1999

RPI 1502

Deferimento

#9.1

11/03/1998

RPI 1452

Exigência - art. 36 da LPI

#6.1

05/12/1998

RPI 1429

Solicitação de exame técnico

#4.1

03/31/1992

RPI 1113

Publicação do pedido de patente

#3.1

03/13/1990

RPI 1009

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