Official data from INPI

FLUIDO DE PERFURAÇÃO E PROCESSO DE PERFURAÇÃO DE UM FURO DE SONDA EM TERRA

Prazo de SigiloInvention Patent

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Application data

Number

PI8904091

Type

Invention Patent

Filing

08/15/1989

Publication

03/27/1990

View on INPI

Progress at the INPI

Filing08/15/89
Publication03/27/90
Examination11/26/91
Allowance
Grant
In force

Published on 03/27/1990, the application is awaiting technical examination at the INPI, which decides whether the invention meets the patentability requirements.

Latest action published by the INPI: 11/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baroid Technology,Inc

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Inventors

J. J. (pessoa física)

Technical data

IPC Classification

C08L 1/28 C08L 33/14 C08L 33/24 C08L 39/00 C09K 8/24

Priority claims

232.297 · 08/15/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/07/1989

RPI 994

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/02; E21B 43/22.

03/27/2018

RPI 2464

Retificação

#15.3

02/21/1996

RPI 1316

Solicitação de exame técnico

#4.1

11/26/1991

RPI 1095

Publicação do pedido de patente

#3.1

03/27/1990

RPI 1011

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