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Official data from INPI

UMA COMPOSICAO DE ESPUMA DE POLIURETANO,PARA APOIO DE UM SUBSTRATO E UM SUBSTRATO QUE CONTEM A COMPOSICAO DE ESPUMA DE POLIURETANO

ConcedidaInvention Patent

Application data

Number

PI8106504

Type

Invention Patent

Filing

09/29/1980

Publication

06/29/1982

Progress at the INPI

  1. Filing09/29/80
  2. Publication06/29/82
  3. Examination08/28/84
  4. Allowance09/30/86
  5. Grant07/28/87
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 07/28/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DOW CHEMICAL CO

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Inventors

J. R. (pessoa física)

P. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/28/1987

RPI 875

Notificação para pagamento de retribuição

#13.1

03/04/1987

RPI 854

Deferimento

#9.1

09/30/1986

RPI 832

Exigência - art. 36 da LPI

#6.1

04/30/1985

RPI 758

Solicitação de exame técnico

#4.1

08/28/1984

RPI 723

Publicação do pedido de patente

#3.1

06/29/1982

RPI 610

Pedido de patente depositado

#2.1

11/24/1981

RPI 579

Carta-patente expirada

#21.1

Patente extinta em 28/09/96

08/19/2008

RPI 1963

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