Official data from INPI

APERFEICOAMENTO EM CHAVE DE FACA

ConcedidaInvention Patent

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Application data

Number

PI7903220

Type

Invention Patent

Filing

05/22/1979

Publication

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Progress at the INPI

Filing05/22/79
Publication
Examination
Allowance08/10/82
Grant05/31/83
Expired07/26/94

The letters patent expired on 07/26/1994: 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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. T. (pessoa física)

Inventors

R. T. (pessoa física)

Technical data

IPC Classification

H01H 21/54

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Deferimento

#9.1

08/10/1982

RPI 616

Exigência - art. 36 da LPI

#6.1

02/24/1982

RPI 592

Carta-patente expirada

#21.1

07/26/1994

RPI 1234

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