Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI7407641

Type

Invention Patent

Filing

09/13/1974

Publication

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Progress at the INPI

Filing09/13/74
Publication
Examination
Allowance
Grant06/02/81
Expired11/24/92

The letters patent expired on 11/24/1992: 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: 06/02/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Centre Spephanois de Recherches Mecaniques Hidromecanique et Frottement

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

C25D 3/58

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/02/1981

RPI 554

Carta-patente expirada

#21.1

11/24/1992

RPI 1147

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