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Official data from INPI

CIRCUITO PARA DETECTAR VARIAÇÕES DE CORRENTE.

Em AnáliseInvention Patent
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Application data

Number

PI8502791

Type

Invention Patent

Filing

06/12/1985

Publication

02/18/1986
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Progress at the INPI

  1. Filing06/12/85
  2. Publication02/18/86
  3. Examination01/19/88
  4. Allowance06/26/90
  5. Grant12/26/90
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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

I. C. (pessoa física)

US

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Inventors

C. J. (pessoa física)

FR

Y. B. (pessoa física)

FR

Technical data

IPC Classification

H04M 3/14

Priority claims

FR

84430019.4 · 06/20/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

01/19/1988

RPI 900

Publicação do pedido de patente

#3.1

02/18/1986

RPI 800

Pedido de patente depositado

#2.1

08/27/1985

RPI 775

Carta-patente expirada

#21.1

Patente extinta em 12/06/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

12/26/1990

RPI 1047

Notificação para pagamento de retribuição

#13.1

10/09/1990

RPI 1036

Deferimento

#9.1

06/26/1990

RPI 1024

Exigência - art. 36 da LPI

#6.1

02/01/1990

RPI 1004

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