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Official data from INPI

PROCESSO DE ENRIQUECIMENTO E PURIFICAÇÃO DE CONCENTRADOS DE MINÉRIO DE ANATÁSIO PARA USO NA PRODUÇÃO DE DIÓXIDO DE TITÂNIO

Arquivada/ExtintaInvention Patent
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Application data

Number

PI9005841

Type

Invention Patent

Filing

11/19/1990

Publication

06/30/1992
View on INPI

Progress at the INPI

  1. Filing11/19/90
  2. Publication06/30/92
  3. Examination12/01/92
  4. Allowance12/05/95
  5. Grant05/28/96
  6. Expired06/08/10

The letters patent expired on 06/08/2010: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 06/08/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AGQ - Andrade Gutierrez Química Ltda

MG, BR

Curuá Mineração Ltda

MG, BR

N. C. (pessoa física)

MG, BR

Inventors

N. C. (pessoa física)

BR

Technical data

IPC Classification

C22B 3/08C22B 34/12

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 19/11/2005

06/08/2010

RPI 2057

Pedido de licença compulsória

#20.1

08/06/1996

RPI 1340

Concessão da patente

#16.1

05/28/1996

RPI 1330

Deferimento

#9.1

12/05/1995

RPI 1305

15.5

11/29/1994

RPI 1252

Solicitação de exame técnico

#4.1

12/01/1992

RPI 1148

Publicação do pedido de patente

#3.1

06/30/1992

RPI 1126

Pedido de patente depositado

#2.1

05/21/1991

RPI 1068

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