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Official data from INPI

PROCESSO PARA OBSTRUIR UMA REGIÃO DE UMA FORMACÃO CONTENDO HIDROCARBONETO DE TEMPERATURA ELEVADA ABAIXO DE UMA SUPERFÍCIE DE TERRA COM UM GEL DE POLÍMERO DE ACRILAMIDA RETICULADO

Arquivada/ExtintaInvention PatentPCT · US1988004227

Application data

Number

PI8807872

Type

Invention Patent

Filing

11/28/1988

Publication

10/09/1990

PCT

US1988004227

Progress at the INPI

  1. Filing11/28/88
  2. Publication10/09/90
  3. Examination04/09/91
  4. Allowance02/08/94
  5. Grant11/29/94
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 09/02/2008. 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

153,860 · 02/09/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 28/11/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

11/29/1994

RPI 1252

Notificação para pagamento de retribuição

#13.1

05/31/1994

RPI 1226

Deferimento

#9.1

02/08/1994

RPI 1210

Solicitação de exame técnico

#4.1

04/09/1991

RPI 1062

Notificação de entrada na fase nacional - PCT

#1.3

10/09/1990

RPI 1036

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