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Official data from INPI

PROCESSO PARA LIXIVIACAO DE MINERIO DE ANATASIO COM ACIDO FLUORIDRICO

ConcedidaInvention Patent

Application data

Number

PI7906692

Type

Invention Patent

Filing

10/17/1979

Publication

-

Progress at the INPI

  1. Filing10/17/79
  2. Publication
  3. Examination08/23/83
  4. Allowance01/13/87
  5. Grant10/27/87
  6. Expired04/25/95

The letters patent expired on 04/25/1995: 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: 10/27/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

VALE DO RIO DOCE CO

Inventors

D. C. (pessoa física)

D. P. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

10/27/1987

RPI 888

Notificação para pagamento de retribuição

#13.1

06/09/1987

RPI 868

Deferimento

#9.1

01/13/1987

RPI 847

Exigência - art. 36 da LPI

#6.1

01/21/1986

RPI 796

Exigência - art. 36 da LPI

#6.1

05/02/1984

RPI 706

7.2

05/02/1984

RPI 706

Conhecimento de parecer técnico

#7.1

02/21/1984

RPI 696

Solicitação de exame técnico

#4.1

08/23/1983

RPI 670

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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