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Official data from INPI

PORTEIRA DE PASSAGEM DE NIVEL;MECANISMO PARA PORTEIRA DE PASSAGEM DE NIVEL;E PORTEIRA PARA PASSAGEM DE NIVEL

Em AnáliseInvention Patent

Application data

Number

PI7800258

Type

Invention Patent

Filing

02/22/1977

Publication

-

Progress at the INPI

  1. Filing02/22/77
  2. Publication
  3. Examination
  4. Allowance11/23/82
  5. Grant06/28/83
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 06/24/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

WESTINGHOUSE AIR BRAKE CO

See this company's full portfolio

Inventors

P. S. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

06/24/1986

RPI 818

Concessão da patente

#16.1

06/28/1983

RPI 662

Notificação para pagamento de retribuição

#13.1

04/05/1983

RPI 650

Deferimento

#9.1

11/23/1982

RPI 631

Exigência - art. 36 da LPI

#6.1

04/27/1982

RPI 601

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

20.11

12/26/1990

RPI 1047

Pedido de licença compulsória

#20.1

10/23/1990

RPI 1038

Pedido de licença compulsória

#20.1

10/16/1990

RPI 1037

20.3

08/21/1990

RPI 1029

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