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Official data from INPI

PROCESSO PARA PRODUZIR UMA ESPUMA DE RESINA DE POLIOLEFINA

ConcedidaInvention Patent

Application data

Number

PI7904653

Type

Invention Patent

Filing

07/24/1978

Publication

-

Progress at the INPI

  1. Filing07/24/78
  2. Publication
  3. Examination
  4. Allowance12/17/85
  5. Grant06/24/86
  6. Expired04/18/95

The letters patent expired on 04/18/1995: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

HITACHI CHEMICAL CO LTD

Inventors

S. A. (pessoa física)

Y. Y. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/24/1986

RPI 818

Notificação para pagamento de retribuição

#13.1

04/22/1986

RPI 809

Deferimento

#9.1

12/17/1985

RPI 791

Exigência - art. 36 da LPI

#6.1

01/15/1985

RPI 743

6.2

04/06/1982

RPI 598

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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