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Official data from INPI

PROCESSO E APERFEICOAMENTO EM APARELHAGEM PARA A REDUCAO DIRETA DE OXIDOS EM UM PRODUTO METALIZADO A QUENTE, NO ESTADO SOLIDO

Em AnáliseInvention Patent

Application data

Number

PI7905516

Type

Invention Patent

Filing

09/08/1978

Publication

-

Progress at the INPI

  1. Filing09/08/78
  2. Publication
  3. Examination
  4. Allowance12/06/83
  5. Grant07/31/84
  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: 09/23/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MIDREX CORP

See this company's full portfolio

Inventors

B. D. (pessoa física)

E. R. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de licença compulsória

#20.1

09/23/1986

RPI 831

Concessão da patente

#16.1

07/31/1984

RPI 719

Notificação para pagamento de retribuição

#13.1

05/22/1984

RPI 709

9.1.3

02/07/1984

RPI 694

Deferimento

#9.1

12/06/1983

RPI 685

Exigência - art. 36 da LPI

#6.1

01/25/1983

RPI 640

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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