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Official data from INPI

PROCESSO PARA PREPARAR UMA FIBRA DE POLIMERO DE ACRILONITRIA COM PROPRIEDADES FISICAS DESEJAVEIS, E FIBRA DE POLIMERO DE ACRILONITRIA.

ConcedidaInvention Patent

Application data

Number

PI7904642

Type

Invention Patent

Filing

07/20/1979

Publication

-

Progress at the INPI

  1. Filing07/20/79
  2. Publication
  3. Examination03/16/82
  4. Allowance02/14/84
  5. Grant09/25/84
  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: 09/25/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

American Cyanamid Co.

US

American Cyanamid Company

US

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Inventors

P. H. (pessoa física)

Technical data

IPC Classification

Priority claims

US

938.201 · 08/30/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

09/25/1984

RPI 727

Notificação para pagamento de retribuição

#13.1

06/05/1984

RPI 711

Deferimento

#9.1

02/14/1984

RPI 695

Exigência - art. 36 da LPI

#6.1

08/30/1983

RPI 671

6.2

02/08/1983

RPI 642

Solicitação de exame técnico

#4.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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