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Official data from INPI

APERFEICOAMENTOS EM PROCESSOS PARA PRODUCAO DE MAGNESIO POR VIA TERMICA

ConcedidaInvention Patent

Application data

Number

PI7803968

Type

Invention Patent

Filing

06/24/1977

Publication

-

Progress at the INPI

  1. Filing06/24/77
  2. Publication
  3. Examination
  4. Allowance05/10/83
  5. Grant11/29/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 11/29/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SOFREM

Inventors

B. R. (pessoa física)

M. A. (pessoa física)

P. C. (pessoa física)

S. L. (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

Deferimento

#9.1

05/10/1983

RPI 655

Exigência - art. 36 da LPI

#6.1

06/15/1982

RPI 608

6.2

12/15/1981

RPI 582

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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