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Official data from INPI

ADITIVO PARA LAMA DE PERFURAÇÃO E PROCESSOS PARA PREPARAR O MESMO, PARA DIMINUIR O DESPRENDIMENTO, COMO FRAGMENTOS DE XISTO E A INSTABILIDADE DO FURO DE SONDAGEM E PARA PERFURAR UM POÇO

ArquivadaInvention PatentPCT · US1990000940

Application data

Number

PI9007162

Type

Invention Patent

Filing

02/16/1990

Publication

11/26/1991

PCT

US1990000940

Progress at the INPI

  1. Filing02/16/90
  2. Publication11/26/91
  3. Abandoned
  4. Allowance
  5. Grant
  6. In force

The application was abandoned: examination was not requested within the 36 months following the 02/16/1990 filing, the deadline set by art. 33 of the Brazilian IP Act. The technology is in the public domain 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

Chevron Research And Technology Company

US

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Inventors

K. C. (pessoa física)

US

M. N. (pessoa física)

US

N. I. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

315,017 · 02/24/1989

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

Arquivamento - Art. 33 da LPI

#11.1

06/28/1994

RPI 1230

Notificação de entrada na fase nacional - PCT

#1.3

11/26/1991

RPI 1095

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