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Official data from INPI

UNIDADE DE VEDAÇÃO AUTO-LOCALIZADA PARA VEDAÇÃO ENTRE UMA TUBULAÇÃO DE POÇO E O FURO DE UM CONDUTO CIRCUNDANTE DE POÇO E PROCESSO DE INSTALAÇÃO DA REFERIDA UNIDADE DE VEDAÇÃO.

Em AnáliseInvention Patent

Application data

Number

PI8801899

Type

Invention Patent

Filing

04/21/1988

Publication

11/22/1988

Progress at the INPI

  1. Filing04/21/88
  2. Publication11/22/88
  3. Examination06/27/89
  4. Allowance
  5. Grant
  6. In force

Published on 11/22/1988, 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: 06/27/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Hughes Tool Company

US

See this company's full portfolio

Inventors

S. J. (pessoa física)

Technical data

IPC Classification

Priority claims

US

041,380 · 04/22/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

06/27/1989

RPI 975

Publicação do pedido de patente

#3.1

11/22/1988

RPI 944

Pedido de patente depositado

#2.1

09/06/1988

RPI 933

Retificação

#15.3

10/01/1991

RPI 1087

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