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Official data from INPI

CONVERSOR DIGITAL DE DOIS PARA QUATRO FIOS PARA SINAIS TOTALMENTE DUPLEX

Em AnáliseInvention Patent
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Application data

Number

PI8106686

Type

Invention Patent

Filing

10/23/1980

Publication

06/29/1982
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Progress at the INPI

  1. Filing10/23/80
  2. Publication06/29/82
  3. Examination04/17/84
  4. Allowance12/17/85
  5. Grant06/24/86
  6. Expired08/19/08

The letters patent expired on 08/19/2008: 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: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

INT STANDARD ELECTRIC CORP

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Inventors

T. R. (pessoa física)

Technical data

IPC Classification

H04B 3/20H04L 5/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

01/19/1988

RPI 900

Concessão da patente

#16.1

06/24/1986

RPI 818

Notificação para pagamento de retribuição

#13.1

04/22/1986

RPI 809

Deferimento

#9.1

12/17/1985

RPI 791

Exigência - art. 36 da LPI

#6.1

06/25/1985

RPI 766

Exigência - art. 36 da LPI

#6.1

11/06/1984

RPI 733

Solicitação de exame técnico

#4.1

04/17/1984

RPI 704

Publicação do pedido de patente

#3.1

06/29/1982

RPI 610

Pedido de patente depositado

#2.1

12/01/1981

RPI 580

Carta-patente expirada

#21.1

Patente extinta em 16/10/96

08/19/2008

RPI 1963

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