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Official data from INPI

PROCESSO PARA PRODUÇÃO CONTÍNUA DE MAGNÉSIO

Em AnáliseInvention Patent

Application data

Number

PI8604504

Type

Invention Patent

Filing

09/19/1986

Publication

05/19/1987

Progress at the INPI

  1. Filing09/19/86
  2. Publication05/19/87
  3. Examination12/06/88
  4. Allowance05/07/91
  5. Grant12/31/91
  6. Expired07/22/08

The letters patent expired on 07/22/2008: 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: 12/06/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Council For Mineral Technology e Samancor Limited.

Mintek

ZA

Samancor Limited

ZA

Inventors

A. S. (pessoa física)

US

N. B. (pessoa física)

ZA

Technical data

IPC Classification

Priority claims

ZA

85/7430 · 09/26/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

12/06/1988

RPI 946

Publicação do pedido de patente

#3.1

05/19/1987

RPI 865

Pedido de patente depositado

#2.1

03/24/1987

RPI 857

Carta-patente expirada

#21.1

Patente extinta em 19/09/2001

07/22/2008

RPI 1959

Pedido de licença compulsória

#20.1

03/22/1994

RPI 1216

Concessão da patente

#16.1

12/31/1991

RPI 1100

Notificação para pagamento de retribuição

#13.1

08/20/1991

RPI 1081

Deferimento

#9.1

05/07/1991

RPI 1066

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