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Official data from INPI

PROCESSO DE OBTENCAO DE CONCENTRADO DE TIO2 DE ALTO TEOR A PARTIR DA ILMENITA POR SULFETACAO SEGUIDA DE LIXIVACAO ACIDA E SEPARACAO MAGNETICA

Em AnáliseInvention Patent
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Application data

Number

PI7608271

Type

Invention Patent

Filing

12/09/1976

Publication

-
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Progress at the INPI

  1. Filing12/09/76
  2. Publication
  3. Examination
  4. Allowance12/13/83
  5. Grant04/24/84
  6. Terminated08/25/87

The patent was granted on 04/24/1984 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 08/25/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

T. C. (pessoa física)

Inventors

A. A. (pessoa física)

A. N. (pessoa física)

L. A. (pessoa física)

Technical data

IPC Classification

C22B 34/12

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

08/25/1987

RPI 879

Concessão da patente

#16.1

04/24/1984

RPI 705

Deferimento

#9.1

12/13/1983

RPI 686

Exigência - art. 36 da LPI

#6.1

07/20/1982

RPI 613

15.0

03/16/1982

RPI 595

Exigência - art. 36 da LPI

#6.1

12/22/1981

RPI 583

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