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Official data from INPI

CIRCUITO EXCITADOR DE INTERFACE

Em AnáliseInvention Patent

Application data

Number

PI8605147

Type

Invention Patent

Filing

10/21/1986

Publication

07/21/1987

Progress at the INPI

  1. Filing10/21/86
  2. Publication07/21/87
  3. Examination08/08/89
  4. Allowance03/29/94
  5. Grant11/29/94
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 08/08/1989. 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

J. D. (pessoa física)

US

R. C. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

789.900 · 10/21/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/08/1989

RPI 981

Publicação do pedido de patente

#3.1

07/21/1987

RPI 874

Pedido de patente depositado

#2.1

04/07/1987

RPI 859

Carta-patente expirada

#21.1

Patente extinta em 21/10/2001

07/22/2008

RPI 1959

Concessão da patente

#16.1

11/29/1994

RPI 1252

Notificação para pagamento de retribuição

#13.1

08/02/1994

RPI 1235

Deferimento

#9.1

03/29/1994

RPI 1217

Republicação - classificação IPC

#15.11

06/01/1993

RPI 1174

Exigência - art. 36 da LPI

#6.1

03/23/1993

RPI 1164

14.1

09/25/1990

RPI 1034

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