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Official data from INPI

Processo para obtenção de polipropileno estabilizado contra degradação oxidante

PublicadaInvention Patent

Application data

Number

PI8706052

Type

Invention Patent

Filing

11/10/1987

Publication

07/05/1988

Progress at the INPI

  1. Filing11/10/87
  2. Publication07/05/88
  3. Examination09/18/90
  4. Allowance02/12/97
  5. Grant08/26/97
  6. Expired08/26/08

The letters patent expired on 08/26/2008: 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: 07/05/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Uniroyal Chemical Company, Inc.

US

See this company's full portfolio

Inventors

T. C. (pessoa física)

US

Technical data

Priority claims

US

941.479 · 12/11/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

07/05/1988

RPI 924

Pedido de patente depositado

#2.1

03/01/1988

RPI 906

Carta-patente expirada

#21.1

Patente extinta em 10/11/2007

08/26/2008

RPI 1964

16.3

Referência: RPI 1395 de 26/08/1997 - Item: Prazo de validade

12/22/1998

RPI 1459

Concessão da patente

#16.1

08/26/1997

RPI 1395

Republicação - classificação IPC

#15.11

02/18/1997

RPI 1368

Deferimento

#9.1

02/12/1997

RPI 1367

Exigência - art. 36 da LPI

#6.1

06/27/1995

RPI 1282

Pedido de certificado de adição de invenção

#5.1

11/27/1990

RPI 1043

Solicitação de exame técnico

#4.1

09/18/1990

RPI 1033

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