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Official data from INPI

Processo para a produção de magnésio metálico a partir de materiais impuros contendo magnésio

PublicadaInvention Patent

Application data

Number

PI8706216

Type

Invention Patent

Filing

11/18/1987

Publication

06/28/1988

Progress at the INPI

  1. Filing11/18/87
  2. Publication06/28/88
  3. Examination09/18/90
  4. Allowance08/12/97
  5. Grant07/28/98
  6. Expired08/26/08

The letters patent expired on 08/26/2008: 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: 06/28/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Noranda Inc

CA

Noranda Metallurgy Inc

CA

Inventors

G. H. (pessoa física)

CA

J. P. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

CA

523.608 · 11/21/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

06/28/1988

RPI 923

Pedido de patente depositado

#2.1

02/23/1988

RPI 905

Carta-patente expirada

#21.1

Patente extinta em 28/07/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

07/28/1998

RPI 1440

Deferimento

#9.1

08/12/1997

RPI 1393

Conhecimento de parecer técnico

#7.1

11/19/1996

RPI 1355

14.1

11/28/1995

RPI 1304

Solicitação de exame técnico

#4.1

09/18/1990

RPI 1033

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