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Official data from INPI

MÉTODO DE PREPARAÇÃO DE POLÍMEROS DE DIENO E PROCESSO PARA PREPARAR UMA COMPOSIÇÃO CATALISADORA

Em ExigênciaInvention Patent

Application data

Number

PI8501456

Type

Invention Patent

Filing

03/29/1985

Publication

04/22/1986

Progress at the INPI

  1. Filing03/29/85
  2. Publication04/22/86
  3. Examination08/05/86
  4. Allowance07/31/90
  5. Grant02/26/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 05/16/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Bridgestone/ Firestone; Inc

DE

The Firestone Tire & Rubber Company

US

See this company's full portfolio

Inventors

J. H. (pessoa física)

US

J. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

616.767 · 06/04/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Exigência - art. 36 da LPI

#6.1

05/16/1989

RPI 969

Solicitação de exame técnico

#4.1

08/05/1986

RPI 824

Publicação do pedido de patente

#3.1

04/22/1986

RPI 809

Pedido de patente depositado

#2.1

06/18/1985

RPI 765

Carta-patente expirada

#21.1

Patente extinta em 29/03/2000

07/15/2008

RPI 1958

20.4

11/08/1994

RPI 1249

Concessão da patente

#16.1

02/26/1991

RPI 1056

Notificação para pagamento de retribuição

#13.1

11/13/1990

RPI 1041

Deferimento

#9.1

07/31/1990

RPI 1026

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