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Official data from INPI

COMPOSIÇÃO DESESPUMANTE PARA LAMAS DE PERFURAÇÃO À BASE DE ÁGUA E PROCESSO PARA FORMAÇÃO DE COMPOSIÇÃO DESESPUMANTE PARA FLUIDOS DE PERFURAÇÃO AQUOSOS

PublicadaInvention Patent

Application data

Number

PI8901265

Type

Invention Patent

Filing

03/20/1989

Publication

11/07/1989

Progress at the INPI

  1. Filing03/20/89
  2. Publication11/07/89
  3. Examination10/22/91
  4. Allowance
  5. Grant
  6. In force

Published on 11/07/1989, 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: 11/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baroid Technology, Inc

US

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Inventors

J. K. (pessoa física)

US

J. A. (pessoa física)

US

M. P. (pessoa física)

US

Technical data

Priority claims

US

185.790 · 04/25/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

11/07/1989

RPI 994

Pedido de patente depositado

#2.1

05/09/1989

RPI 968

Retificação

#15.3

08/23/1994

RPI 1238

Solicitação de exame técnico

#4.1

10/22/1991

RPI 1090

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