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Official data from INPI

PROCESSO PARA PREPARAR UMA COMPOSICAO UTILZAVEL PARA VULCANIZAR UM PREPOLIMERO TERMINADO EM ISOCIANATO COMPOSICAO ADEQUADA PARA VULCANIZAR PREPOLIMEROS DE POLIURETANAS TERMINADAS EM ISOCIANATO E COMPOSICAO VULCANIZAVEL

Em AnáliseInvention Patent

Application data

Number

PI7906585

Type

Invention Patent

Filing

11/02/1978

Publication

-

Progress at the INPI

  1. Filing11/02/78
  2. Publication
  3. Examination06/29/82
  4. Allowance06/26/84
  5. Grant12/26/84
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 07/18/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

DU PONT

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Inventors

C. P. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

07/18/1989

RPI 978

Concessão da patente

#16.1

12/26/1984

RPI 740

Notificação para pagamento de retribuição

#13.1

10/23/1984

RPI 731

Deferimento

#9.1

06/26/1984

RPI 714

Exigência - art. 36 da LPI

#6.1

01/10/1984

RPI 690

Solicitação de exame técnico

#4.1

06/29/1982

RPI 610

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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