Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI7406835

Type

Invention Patent

Filing

08/19/1974

Publication

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Progress at the INPI

Filing08/19/74
Publication
Examination
Allowance
Grant05/20/80
Expired11/17/92

The letters patent expired on 11/17/1992: 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: 05/20/1980. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

I. C. (pessoa física)

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

H03H 17/00 H03H 17/06 H03M 1/00 H03M 7/00 H03M 7/04 H03M 7/32

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/20/1980

RPI 500

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era H03K 13/24.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

11/17/1992

RPI 1146

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