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Official data from INPI

PROCESSO PARA EVITAR CIRCULAÇÃO PERDIDA E PROCESSO PARA REDUZIR CIRCULAÇÃO PERDIDA DE LAMA DE PERFURAÇÃO

Arquivada/ExtintaInvention PatentPCT · US1990002899

Application data

Number

PI9007244

Type

Invention Patent

Filing

05/22/1990

Publication

03/17/1992

PCT

US1990002899

Progress at the INPI

  1. Filing05/22/90
  2. Publication03/17/92
  3. Examination03/30/93
  4. Allowance11/17/98
  5. Grant08/24/99
  6. Expired01/15/13

The letters patent expired on 01/15/2013: 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: 03/27/2018. 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

07/380.565 · 07/14/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. A classificação IPC anterior era C09K 7/02.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 22/05/2010

01/15/2013

RPI 2193

Concessão da patente

#16.1

08/24/1999

RPI 1494

Deferimento

#9.1

11/17/1998

RPI 1454

Exigência - art. 36 da LPI

#6.1

03/25/1997

RPI 1373

Solicitação de exame técnico

#4.1

03/30/1993

RPI 1165

Notificação de entrada na fase nacional - PCT

#1.3

03/17/1992

RPI 1111

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