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Official data from INPI

PROCESSO PARA INSTALAÇÃO DE UMA ESTACA OCA EM UMA FORMAÇÃO DE TERRA

PublicadaInvention Patent

Application data

Number

PI8704181

Type

Invention Patent

Filing

08/12/1987

Publication

04/12/1988

Progress at the INPI

  1. Filing08/12/87
  2. Publication04/12/88
  3. Examination11/20/90
  4. Allowance07/23/91
  5. Grant05/26/92
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 04/12/1988. 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

D. R. (pessoa física)

NL

R. L. (pessoa física)

GB

Technical data

IPC Classification

Priority claims

GB

8619785 · 08/14/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/12/1988

RPI 912

Pedido de patente depositado

#2.1

11/10/1987

RPI 890

Carta-patente expirada

#21.1

Patente extinta em 12/08/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

05/26/1992

RPI 1121

Notificação para pagamento de retribuição

#13.1

11/19/1991

RPI 1094

Deferimento

#9.1

07/23/1991

RPI 1077

Solicitação de exame técnico

#4.1

11/20/1990

RPI 1042

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