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Official data from INPI

COMPARADOR DE FASE A ZERO GRAUS.

ConcedidaInvention Patent
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Application data

Number

PI8003128

Type

Invention Patent

Filing

05/16/1980

Publication

01/19/1982
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Progress at the INPI

  1. Filing05/16/80
  2. Publication01/19/82
  3. Examination07/20/82
  4. Allowance01/15/85
  5. Grant08/27/85
  6. Expired06/13/95

The letters patent expired on 06/13/1995: 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: 08/27/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Telecomunicações Brasileiras S/A-Telebrás

SP, BR

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Inventors

D. I. (pessoa física)

V. B. (pessoa física)

Technical data

IPC Classification

H03L 7/06

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/27/1985

RPI 775

Notificação para pagamento de retribuição

#13.1

05/07/1985

RPI 759

Deferimento

#9.1

01/15/1985

RPI 743

Exigência - art. 36 da LPI

#6.1

04/17/1984

RPI 704

Exigência - art. 36 da LPI

#6.1

11/08/1983

RPI 681

Solicitação de exame técnico

#4.1

07/20/1982

RPI 613

Solicitação de exame não realizada

#4.2

04/06/1982

RPI 598

Publicação do pedido de patente

#3.1

01/19/1982

RPI 587

Carta-patente expirada

#21.1

06/13/1995

RPI 1280

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