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Official data from INPI

PROCESSO PARA RETROENCATAR UM TRUQUE FERROVIÁRIO, CONJUNTO DE TRUQUE E TRUQE PARA UM VEÍCULO FERROVIÁRIO.

Em AnáliseInvention Patent

Application data

Number

PI7906422

Type

Invention Patent

Filing

10/04/1979

Publication

-

Progress at the INPI

  1. Filing10/04/79
  2. Publication
  3. Examination
  4. Allowance05/08/84
  5. Grant11/27/84
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 12/02/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Dresser Industries Inc

US

See this company's full portfolio

Inventors

L. H. (pessoa física)

Technical data

IPC Classification

Priority claims

US

948.878 · 10/05/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

12/02/1986

RPI 841

Concessão da patente

#16.1

11/27/1984

RPI 736

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/08/1984

RPI 707

Exigência - art. 36 da LPI

#6.1

12/13/1983

RPI 686

Exigência - art. 36 da LPI

#6.1

08/30/1983

RPI 671

Exigência - art. 36 da LPI

#6.1

12/14/1982

RPI 634

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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