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Official data from INPI

COMPOSIÇÃO POLIMÉRICA ESTABILIZADA

PublicadaInvention Patent

Application data

Number

PI8801875

Type

Invention Patent

Filing

04/20/1988

Publication

11/22/1988

Progress at the INPI

  1. Filing04/20/88
  2. Publication11/22/88
  3. Examination12/04/90
  4. Allowance08/01/95
  5. Grant03/26/96
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 11/22/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

See this company's full portfolio

Inventors

E. K. (pessoa física)

NL

Technical data

Priority claims

GB

8709488 · 04/22/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/22/1988

RPI 944

Pedido de patente depositado

#2.1

08/30/1988

RPI 932

Carta-patente expirada

#21.1

Patente extinta em 20/04/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

03/26/1996

RPI 1321

Deferimento

#9.1

08/01/1995

RPI 1287

Exigência - art. 36 da LPI

#6.1

06/21/1994

RPI 1229

Solicitação de exame técnico

#4.1

12/04/1990

RPI 1044

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