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Official data from INPI

PROCESSO DE CIMENTAÇÃO PRINCIPAL PARA COMPLEMENTAÇÃO DE REVESTIMENTO EM FURO DE POÇO E PROCESSO DE CIMENTAÇÃO POR COMPRESSÃO APLICADA A UM FURO DE POÇO REVESTIDO

Arquivada/ExtintaInvention PatentPCT · US1987002444

Application data

Number

PI8707883

Type

Invention Patent

Filing

09/28/1987

Publication

10/31/1989

PCT

US1987002444

Progress at the INPI

  1. Filing09/28/87
  2. Publication10/31/89
  3. Examination03/13/90
  4. Allowance10/01/96
  5. Grant08/25/98
  6. Expired08/26/08

The letters patent expired on 08/26/2008: 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: 10/31/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Marathon Oil Company

US

See this company's full portfolio

Inventors

R. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

945.730 · 12/22/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Notificação de entrada na fase nacional - PCT

#1.3

10/31/1989

RPI 993

Carta-patente expirada

#21.1

Patente extinta em 25/08/2008

08/26/2008

RPI 1964

Concessão da patente

#16.1

08/25/1998

RPI 1444

Notificação para pagamento de retribuição

#13.1

05/13/1997

RPI 1380

Deferimento

#9.1

10/01/1996

RPI 1348

Exigência - art. 36 da LPI

#6.1

10/20/1992

RPI 1142

Solicitação de exame técnico

#4.1

03/13/1990

RPI 1009

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