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Official data from INPI

APERFEICOAMENTO EM INSTALACAO E APERFEICOAMENTO EM PROCESSO DE PRODUZIR RODAS DE VAGOES FERROVIARIOS FUNDIDAS EM COQUILHA

ConcedidaInvention Patent

Application data

Number

PI7904145

Type

Invention Patent

Filing

07/03/1978

Publication

-

Progress at the INPI

  1. Filing07/03/78
  2. Publication
  3. Examination
  4. Allowance05/10/83
  5. Grant11/29/83
  6. Expired04/04/95

The letters patent expired on 04/04/1995: 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: 11/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMSTED IND INC

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Inventors

B. J. (pessoa física)

R. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/29/1983

RPI 684

Notificação para pagamento de retribuição

#13.1

09/27/1983

RPI 675

Republicação - classificação IPC

#15.11

05/24/1983

RPI 657

Deferimento

#9.1

05/10/1983

RPI 655

Carta-patente expirada

#21.1

04/04/1995

RPI 1270

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