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Official data from INPI

VÁLVULA DE CONTROLE APERFEIÇOADA PARA FREIO DE TREM DE CARGA TENDO PROTEÇÃO DE COBERTURA CONTRA VAZAMENTOS

Arquivada/ExtintaInvention Patent

Application data

Number

PI9103727

Type

Invention Patent

Filing

08/29/1991

Publication

05/19/1992

Progress at the INPI

  1. Filing08/29/91
  2. Publication05/19/92
  3. Examination10/04/94
  4. Allowance09/19/95
  5. Grant05/28/96
  6. Expired06/29/10

The letters patent expired on 06/29/2010: 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: 06/29/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Westinghouse Air Brake Company

US

See this company's full portfolio

Inventors

C. W. (pessoa física)

US

J. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

07/574,718 · 08/29/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 29/08/2006

06/29/2010

RPI 2060

Concessão da patente

#16.1

05/28/1996

RPI 1330

Deferimento

#9.1

09/19/1995

RPI 1294

15.9

10/04/1994

RPI 1244

Solicitação de exame técnico

#4.1

10/04/1994

RPI 1244

4.2.1

10/04/1994

RPI 1244

Solicitação de exame não realizada

#4.2

06/28/1994

RPI 1230

Publicação do pedido de patente

#3.1

05/19/1992

RPI 1120

Pedido de patente depositado

#2.1

10/08/1991

RPI 1088

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