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Official data from INPI

DISPOSIÇÃO DE RELÉ VITAL DE ESTADO SÓLIDO E DISPOSIÇÃO DE CIRCUITO DE VIA PARA UMA SEÇÃO ISOLADA DE VIA FÉRREA

ConcedidaInvention Patent

Application data

Number

PI8304102

Type

Invention Patent

Filing

08/01/1983

Publication

03/07/1984

Progress at the INPI

  1. Filing08/01/83
  2. Publication03/07/84
  3. Examination03/25/86
  4. Allowance10/04/88
  5. Grant08/29/89
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 08/29/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMERICAN STANDARD INC.

Union Switch & Signal, Inc.

US

See this company's full portfolio

Inventors

H. G. (pessoa física)

Technical data

IPC Classification

Priority claims

US

404.182 · 08/02/1982

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/29/1989

RPI 984

Notificação para pagamento de retribuição

#13.1

01/24/1989

RPI 953

Deferimento

#9.1

10/04/1988

RPI 937

6.2

10/06/1987

RPI 885

Solicitação de exame técnico

#4.1

03/25/1986

RPI 805

Publicação do pedido de patente

#3.1

03/07/1984

RPI 698

Pedido de patente depositado

#2.1

10/11/1983

RPI 677

Carta-patente expirada

#21.1

Patente extinta em 01/08/98

07/01/2008

RPI 1956

14.1

08/14/1990

RPI 1028

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