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Official data from INPI

COMPOSIÇÃO DE FLUÍDO DE PERFURAÇÃO

Em AnáliseInvention Patent

Application data

Number

PI8702774

Type

Invention Patent

Filing

05/29/1987

Publication

12/27/1988

Progress at the INPI

  1. Filing05/29/87
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. In force

The application was filed at the INPI on 05/29/1987. It awaits formal examination and publication in the RPI gazette.

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Latest action published by the INPI: 09/19/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Aqualon Company

US

Inventors

C. L. (pessoa física)

US

C. L. (pessoa física)

US

R. P. (pessoa física)

GB

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.7

09/19/1989

RPI 987

Publicação do pedido de patente

#3.1

12/27/1988

RPI 949

Pedido de patente depositado

#2.1

08/18/1987

RPI 878

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: C09K 7/02; C09K 7/00.

03/27/2018

RPI 2464

Retificação

#15.3

02/16/1994

RPI 1211

Pedido de certificado de adição de invenção

#5.1

07/09/1991

RPI 1075

Solicitação de exame técnico

#4.1

03/12/1991

RPI 1058

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