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Official data from INPI

APERFEIÇOAMENTO EM UM PROCESSO DE FRATURA DE CAMADAS SUBTERRÂNEAS OU DE RECUPERAÇÃO DE PETRÓLEO DAS MESMAS, NO QUAL É EMPREGADO UM AQUOSO QUE CONTÉM UM AGENTE DE VISCOSIDADE.

Em AnáliseInvention Patent

Application data

Number

PI8004024

Type

Invention Patent

Filing

06/27/1980

Publication

-

Progress at the INPI

Technical opinion to answer
  1. Filing06/27/80
  2. Publication
  3. Examination05/25/82
  4. Allowance
  5. Grant
  6. In force

The INPI issued a technical opinion on patentability. The applicant must respond for examination to continue.

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Latest action published by the INPI: 12/20/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

U. C. (pessoa física)

US

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Inventors

No inventors listed.

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Retificação

#15.3

12/20/1988

RPI 948

Republicação - classificação IPC

#15.11

10/02/1984

RPI 728

Conhecimento de parecer técnico

#7.1

03/27/1984

RPI 701

6.2

12/07/1982

RPI 633

Solicitação de exame técnico

#4.1

05/25/1982

RPI 605

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