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Official data from INPI

CONDUTO TUBULAR ISOLADO, DE PAREDES CONCÊNTRICAS PARA A FORMAÇÃO DE UMA COLUNA TUBULAR EM UM POÇO SUBTERRÂNEO.

ArquivadaInvention Patent

Application data

Number

PI8601182

Type

Invention Patent

Filing

03/17/1986

Publication

10/27/1987

Progress at the INPI

  1. Filing03/17/86
  2. Publication10/27/87
  3. Examination01/16/90
  4. Allowance
  5. Grant
  6. In force

Published on 10/27/1987, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

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Latest action published by the INPI: 12/12/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baker Oil Tools, Inc.

US

Inventors

D. M. (pessoa física)

US

D. C. (pessoa física)

US

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Arquivamento - Art. 33 da LPI

#11.1

12/12/1989

RPI 999

Publicação do pedido de patente

#3.1

10/27/1987

RPI 888

Pedido de patente depositado

#2.1

10/07/1986

RPI 833

14.2

06/18/1991

RPI 1072

Indeferimento

#9.2

08/07/1990

RPI 1027

Pedido de certificado de adição de invenção

#5.1

03/27/1990

RPI 1011

11.8

01/16/1990

RPI 1002

Solicitação de exame técnico

#4.1

01/16/1990

RPI 1002

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