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Official data from INPI

PROCESSO PARA LIXIVIACAO CONTINUA DE MINERIO EM CONTRA-CORRENTE E APARELHAGEM PARA SUA EXECUCAO

ConcedidaInvention Patent

Application data

Number

PI7906656

Type

Invention Patent

Filing

10/16/1979

Publication

-

Progress at the INPI

  1. Filing10/16/79
  2. Publication
  3. Examination08/30/83
  4. Allowance04/08/86
  5. Grant12/30/86
  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: 12/30/1986. 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

12/30/1986

RPI 845

Notificação para pagamento de retribuição

#13.1

08/12/1986

RPI 825

Deferimento

#9.1

04/08/1986

RPI 807

Exigência - art. 36 da LPI

#6.1

06/11/1985

RPI 764

Exigência - art. 36 da LPI

#6.1

09/11/1984

RPI 725

Conhecimento de parecer técnico

#7.1

05/02/1984

RPI 706

Exigência - art. 36 da LPI

#6.1

01/31/1984

RPI 693

Solicitação de exame técnico

#4.1

08/30/1983

RPI 671

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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