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Official data from INPI

MÉTODO DE EXPLORAÇÃO SISMICA.

Em AnáliseInvention PatentPCT · US1984000731

Application data

Number

PI8407323

Type

Invention Patent

Filing

05/15/1984

Publication

09/23/1986

PCT

US1984000731

Progress at the INPI

  1. Filing05/15/84
  2. Publication09/23/86
  3. Examination02/23/88
  4. Allowance05/16/89
  5. Grant02/06/90
  6. Expired07/08/08

The letters patent expired on 07/08/2008: 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: 09/19/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Shell Oil Company

US

See this company's full portfolio

Inventors

A. S. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação para pagamento de retribuição

#13.1

09/19/1989

RPI 987

Deferimento

#9.1

05/16/1989

RPI 969

Exigência - art. 36 da LPI

#6.1

12/27/1988

RPI 949

Pedido de certificado de adição de invenção

#5.1

07/05/1988

RPI 924

Solicitação de exame técnico

#4.1

02/23/1988

RPI 905

Notificação de entrada na fase nacional - PCT

#1.3

09/23/1986

RPI 831

Carta-patente expirada

#21.1

Patente extinta em 15/05/99

07/08/2008

RPI 1957

Concessão da patente

#16.1

02/06/1990

RPI 1005

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