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Official data from INPI

PROCESSO DE RECHEIO DE POÇO COM DENSIDADE DE PARTÍCULA-LÍQUIDO AJUSTADA

PublicadaInvention Patent

Application data

Number

PI8705371

Type

Invention Patent

Filing

10/08/1987

Publication

04/25/1989

Progress at the INPI

  1. Filing10/08/87
  2. Publication04/25/89
  3. Examination05/14/91
  4. Allowance
  5. Grant
  6. In force

Published on 04/25/1989, 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: 04/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Pumptech N.V

BE

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Inventors

C. C. (pessoa física)

US

D. G. (pessoa física)

US

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/25/1989

RPI 966

Pedido de patente depositado

#2.1

12/22/1987

RPI 896

Retificação

#15.3

03/23/1993

RPI 1164

Solicitação de exame técnico

#4.1

05/14/1991

RPI 1067

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