Official data from INPI

PROCESSO PARA CONTROLE DE MOTOR DIGITAL E APARELHO PARA MEDICAO DURANTE PERFURACAO

Em AnáliseInvention Patent

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Application data

Number

PI7706432

Type

Invention Patent

Filing

09/29/1976

Publication

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Progress at the INPI

Filing09/29/76
Publication
Examination
Allowance03/16/82
Grant
Terminated08/28/90

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: 07/06/1982. 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).

Notificação para pagamento de retribuição

#13.1

07/06/1982

RPI 611

Deferimento

#9.1

03/16/1982

RPI 595

Anuidade - prazo legal encerrado

#18.2

08/28/1990

RPI 1030

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 SISTEMA PARA EXTRACAO DE INFORMACAO DE MARCACAO DE TEMPO DE UMA ONDA PORTADORA MODULADA APARELHO DE VALVULA E PROCESSO PARA CORTAR TUBULACAO BOBINADA DE POCO PROCESSO E APARELHO PARA VALVULA DE REVERSAO CONTROLADA POR PRESSAO

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