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Official data from INPI

PROCESSO E DISPOSITIVO PARA A PRODUCAO DE FERRO GUSA LIQUIDO E GAS DE REDUCAO NUM GASEIFICADOR DE FUNDICAO

ConcedidaInvention Patent

Application data

Number

PI7906364

Type

Invention Patent

Filing

10/04/1978

Publication

-

Progress at the INPI

  1. Filing10/04/78
  2. Publication
  3. Examination
  4. Allowance08/07/84
  5. Grant08/26/86
  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: 08/26/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

K. S. (pessoa física)

Inventors

E. E. (pessoa física)

M. W. (pessoa física)

R. B. (pessoa física)

S. G. (pessoa física)

W. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/26/1986

RPI 827

Notificação para pagamento de retribuição

#13.1

12/11/1984

RPI 738

Deferimento

#9.1

08/07/1984

RPI 720

14.1

03/07/1984

RPI 698

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

20.4

10/20/1992

RPI 1142

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