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Official data from INPI

APARELHO OBTURADOR DE DUPLA COLUNA E PROCESSO DE SEU POSICIONAMENTO EM POÇO SUBTERRÂNEO

Em AnáliseInvention Patent

Application data

Number

PI8801261

Type

Invention Patent

Filing

03/18/1988

Publication

10/25/1988

Progress at the INPI

  1. Filing03/18/88
  2. Publication10/25/88
  3. Examination07/09/91
  4. Allowance
  5. Grant
  6. In force

Published on 10/25/1988, 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: 02/14/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baker Hughes Production Tools, Inc.

US

Inventors

M. G. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

028.742 · 03/23/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.4

02/14/1989

RPI 956

Publicação do pedido de patente

#3.1

10/25/1988

RPI 940

Pedido de patente depositado

#2.1

06/28/1988

RPI 923

Retificação

#15.3

03/09/1993

RPI 1162

Solicitação de exame técnico

#4.1

07/09/1991

RPI 1075

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