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Official data from INPI

PROCESSO PARA LIXIVIAÇÃO POR OXIDAÇÃO SOB PRESSÃO DE MATERIAL SULFETADO DE METAL NÃO FERROSO

Em ExigênciaInvention Patent

Application data

Number

PI8504540

Type

Invention Patent

Filing

09/18/1985

Publication

07/15/1986

Progress at the INPI

  1. Filing09/18/85
  2. Publication07/15/86
  3. Examination08/16/88
  4. Allowance09/17/91
  5. Grant06/30/92
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 05/30/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sherritt Gordon Mines Limited

CA

Inventors

D. W. (pessoa física)

CA

Technical data

IPC Classification

Priority claims

CA

463.634 · 09/19/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

6.2

05/30/1989

RPI 971

Solicitação de exame técnico

#4.1

08/16/1988

RPI 930

Publicação do pedido de patente

#3.1

07/15/1986

RPI 821

Pedido de patente depositado

#2.1

11/19/1985

RPI 787

Carta-patente expirada

#21.1

Patente extinta em 18/09/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

06/30/1992

RPI 1126

Notificação para pagamento de retribuição

#13.1

01/21/1992

RPI 1103

Deferimento

#9.1

09/17/1991

RPI 1085

Exigência - art. 36 da LPI

#6.1

02/13/1991

RPI 1054

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