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Official data from INPI

PROCESSO PARA MINERAÇÃO EM SOLUÇÕES DE SAIS DE UM DEPÓSITO DE SAL SUBTERRÂNEO

ConcedidaInvention Patent

Application data

Number

PI7905287

Type

Invention Patent

Filing

07/06/1979

Publication

-

Progress at the INPI

  1. Filing07/06/79
  2. Publication
  3. Examination10/20/81
  4. Allowance10/25/83
  5. Grant04/29/86
  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: 04/29/1986. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Internationale Research Maatschappij B.V

NL

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Inventors

E. A. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/29/1986

RPI 810

Notificação para pagamento de retribuição

#13.1

12/03/1985

RPI 789

110

10/08/1985

RPI 781

Recurso

#12.1

02/14/1984

RPI 695

Deferimento

#9.1

10/25/1983

RPI 679

Exigência - art. 36 da LPI

#6.1

04/19/1983

RPI 652

Exigência - art. 36 da LPI

#6.1

07/06/1982

RPI 611

Solicitação de exame técnico

#4.1

10/20/1981

RPI 574

Carta-patente expirada

#21.1

04/18/1995

RPI 1272

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