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Official data from INPI

COMPOSICAO DE SILICONA CURAVEL PARA DAR UM ELASTOMERO RETARDADOR DA CHAMA,E PROCESSO PARA SUA PREPARACAO

Concessão AnuladaInvention Patent

Application data

Number

PI7704237

Type

Invention Patent

Filing

03/07/1977

Publication

-

Progress at the INPI

  1. Filing03/07/77
  2. Publication
  3. Examination
  4. Allowance09/21/82
  5. Grant04/26/83
  6. Expired07/06/93

The letters patent expired on 07/06/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 10/25/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. C. (pessoa física)

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Inventors

H. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

10/25/1983

RPI 679

Concessão da patente

#16.1

04/26/1983

RPI 653

Notificação para pagamento de retribuição

#13.1

01/25/1983

RPI 640

Deferimento

#9.1

09/21/1982

RPI 622

Exigência - art. 36 da LPI

#6.1

02/09/1982

RPI 590

Carta-patente expirada

#21.1

07/06/1993

RPI 1179

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