Official data from INPI

PROCESSO PARA IMPERMEABILIZAR COURO

ConcedidaInvention Patent

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Application data

Number

PI8007487

Type

Invention Patent

Filing

11/17/1979

Publication

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Progress at the INPI

Filing11/17/79
Publication
Examination09/20/83
Allowance04/17/84
Grant10/30/84
Expired12/26/95

The letters patent expired on 12/26/1995: 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: 10/30/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

B. A. (pessoa física)

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Inventors

H. F. (pessoa física)

H. W. (pessoa física)

T. L. (pessoa física)

Technical data

IPC Classification

C14C 9/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/30/1984

RPI 732

Notificação para pagamento de retribuição

#13.1

08/07/1984

RPI 720

Deferimento

#9.1

04/17/1984

RPI 704

Solicitação de exame técnico

#4.1

09/20/1983

RPI 674

Carta-patente expirada

#21.1

12/26/1995

RPI 1308

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