Official data from INPI

APARELHO DE VALVULA E PROCESSO PARA CORTAR TUBULACAO BOBINADA DE POCO

DeferidaInvention Patent

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Application data

Number

PI7701576

Type

Invention Patent

Filing

03/22/1976

Publication

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Progress at the INPI

Filing03/22/76
Publication
Examination
Allowance02/16/82
Grant
Terminated01/21/92

The patent was granted and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 02/16/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SCHLUMBERGER TECHNOLOGY CORP

Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

02/16/1982

RPI 591

Anuidade - prazo legal encerrado

#18.2

01/21/1992

RPI 1103

From the same holder

PROCESSO E APARELHO PARA DEMODULAR SINAIS EM UM SISTEMA DE PERFILAGEM SIMULTANEA COM PERFURACAO VALVULA DE SEGURANCA PARA TESTE COM HASTE DE SONDAGEM PROCESSO PARA CONTROLE DE MOTOR DIGITAL E APARELHO PARA MEDICAO DURANTE PERFURACAO SISTEMA PARA EXTRACAO DE INFORMACAO DE MARCACAO DE TEMPO DE UMA ONDA PORTADORA MODULADA PROCESSO E APARELHO PARA VALVULA DE REVERSAO CONTROLADA POR PRESSAO

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