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Official data from INPI

ARRANJO REGULADOR DE SEGURANÇA DISCRIMINATÓRIA PARA CONSERVAÇÃO DE EIXO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004636

Type

Invention Patent

Filing

09/18/1990

Publication

09/10/1991

Progress at the INPI

  1. Filing09/18/90
  2. Publication09/10/91
  3. Examination12/10/91
  4. Allowance04/27/99
  5. Grant08/24/99
  6. Expired05/21/13

The letters patent expired on 05/21/2013: 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: 05/21/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Westinghouse Air Brake Company.

US

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Inventors

J. W. (pessoa física)

US

J. D. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

408.822 · 09/18/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 18/09/2010

05/21/2013

RPI 2211

Concessão da patente

#16.1

08/24/1999

RPI 1494

Deferimento

#9.1

04/27/1999

RPI 1477

Exigência - art. 36 da LPI

#6.1

10/27/1998

RPI 1451

Solicitação de exame técnico

#4.1

12/10/1991

RPI 1097

Publicação do pedido de patente

#3.1

09/10/1991

RPI 1084

Pedido de patente depositado

#2.1

04/02/1991

RPI 1061

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