Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI8102985

Type

Invention Patent

Filing

05/13/1981

Publication

02/02/1982

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Progress at the INPI

Filing05/13/81
Publication02/02/82
Examination03/20/84
Allowance05/07/85
Grant10/01/85
Expired10/01/96

The letters patent expired on 10/01/1996: 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: 10/01/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

L. T. (pessoa física)

Inventors

C. C. (pessoa física)

Technical data

IPC Classification

H03F 1/32

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/01/1985

RPI 780

Deferimento

#9.1

05/07/1985

RPI 759

Exigência - art. 36 da LPI

#6.1

09/04/1984

RPI 724

Solicitação de exame técnico

#4.1

03/20/1984

RPI 700

Publicação do pedido de patente

#3.1

02/02/1982

RPI 589

Carta-patente expirada

#21.1

10/01/1996

RPI 1348

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