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Official data from INPI

CIRCUITO OSCILADOR VITAL E OSCILADOR DE ONDA QUADRADA ELETRÔNICO A PROVA DE FALHAS

Em ExigênciaInvention Patent

Application data

Number

PI8503938

Type

Invention Patent

Filing

08/19/1985

Publication

05/27/1986

Progress at the INPI

  1. Filing08/19/85
  2. Publication05/27/86
  3. Examination04/26/88
  4. Allowance08/13/91
  5. Grant06/30/92
  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.

Talk to a specialist

Latest action published by the INPI: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Union Switch & Signal, Inc.

US

See this company's full portfolio

Inventors

R. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

642.453 · 08/20/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

05/30/1989

RPI 971

Solicitação de exame técnico

#4.1

04/26/1988

RPI 914

Publicação do pedido de patente

#3.1

05/27/1986

RPI 814

Pedido de patente depositado

#2.1

10/22/1985

RPI 783

Carta-patente expirada

#21.1

Patente extinta em 19/08/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

06/30/1992

RPI 1126

Notificação para pagamento de retribuição

#13.1

12/10/1991

RPI 1097

Deferimento

#9.1

08/13/1991

RPI 1080

14.1

09/25/1990

RPI 1034

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