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Official data from INPI

PROCESSO DE EXTRAÇÃO DE COLÔMBIO-TÂNTALO A PARTIR DE MINERIOS DE PIROCLORO

ConcedidaInvention Patent

Application data

Number

PI7904995

Type

Invention Patent

Filing

08/03/1979

Publication

-

Progress at the INPI

  1. Filing08/03/79
  2. Publication
  3. Examination
  4. Allowance12/11/84
  5. Grant08/27/85
  6. Expired04/18/95

The letters patent expired on 04/18/1995: 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: 08/27/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Teledyne Industries, Inc

US

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Inventors

N. R. (pessoa física)

P. P. (pessoa física)

Technical data

IPC Classification

Priority claims

US

929.545 · 08/04/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/27/1985

RPI 775

Notificação para pagamento de retribuição

#13.1

04/09/1985

RPI 755

Deferimento

#9.1

12/11/1984

RPI 738

Exigência - art. 36 da LPI

#6.1

01/17/1984

RPI 691

Exigência - art. 36 da LPI

#6.1

02/01/1983

RPI 641

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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