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Official data from INPI

CONCENTRADO DE POLÍMERO EMPREGADO COMO ADITIVO QUE MELHORA A RESISTIVIDADE ,E, PROCESSO PARA PREPARAÇÃO DE UM POLÍMERO

Prazo de SigiloInvention Patent

Application data

Number

PI8704353

Type

Invention Patent

Filing

08/25/1987

Publication

-

Progress at the INPI

  1. Filing08/25/87
  2. Publication
  3. Examination10/30/90
  4. Allowance07/04/95
  5. Grant01/30/96
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 11/17/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Imperial Chemical Industries Plc.

GB

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Inventors

J. T. (pessoa física)

BE

Technical data

IPC Classification

Priority claims

GB

8621094 · 09/01/1986

GB

8716948 · 07/17/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/17/1987

RPI 891

Carta-patente expirada

#21.1

Patente extinta em 25/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

01/30/1996

RPI 1313

Notificação para pagamento de retribuição

#13.1

11/14/1995

RPI 1302

Deferimento

#9.1

07/04/1995

RPI 1283

Exigência - art. 36 da LPI

#6.1

01/14/1992

RPI 1102

Solicitação de exame técnico

#4.1

10/30/1990

RPI 1039

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