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Official data from INPI

PROCESSO PARA PREPARAR UM POLÍMERO ESTRELA ENXERTADO, E, COMPOSIÇÃO DE ÓLEO LUBRIFICANTE

Arquivada/ExtintaInvention Patent

Application data

Number

PI8906616

Type

Invention Patent

Filing

12/20/1989

Publication

09/04/1990

Progress at the INPI

  1. Filing12/20/89
  2. Publication09/04/90
  3. Examination10/13/92
  4. Allowance04/30/96
  5. Grant03/25/97
  6. Expired12/29/09

The letters patent expired on 12/29/2009: 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: 12/29/2009. 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

A. Z. (pessoa física)

NL

G. K. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

GB

8829896.3 · 12/22/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 20/12/2004

12/29/2009

RPI 2034

Concessão da patente

#16.1

03/25/1997

RPI 1373

Deferimento

#9.1

04/30/1996

RPI 1326

Exigência - art. 36 da LPI

#6.1

02/07/1995

RPI 1262

Solicitação de exame técnico

#4.1

10/13/1992

RPI 1141

Publicação do pedido de patente

#3.1

09/04/1990

RPI 1031

Pedido de patente depositado

#2.1

04/10/1990

RPI 1013

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