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Official data from INPI

PROCESSO E SISTEMA DE FILTRAÇÃO EM TEMPO REAL EM PERFILAGEM NUCLEAR DE POÇOS E SEMELHANTES

ConcedidaInvention Patent

Application data

Number

PI8204377

Type

Invention Patent

Filing

07/27/1982

Publication

07/19/1983

Progress at the INPI

  1. Filing07/27/82
  2. Publication07/19/83
  3. Examination09/24/85
  4. Allowance07/14/87
  5. Grant12/29/87
  6. Terminated06/26/90

The patent was granted on 12/29/1987 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

Talk to a specialist

Latest action published by the INPI: 12/29/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Prad Research and Development N.V.

NL

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Inventors

P. N. (pessoa física)

NL

Technical data

IPC Classification

Priority claims

US

353.228 · 03/01/1982

US

81401249 · 07/21/1981

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

12/29/1987

RPI 897

Deferimento

#9.1

07/14/1987

RPI 873

Exigência - art. 36 da LPI

#6.1

10/29/1986

RPI 836

Solicitação de exame técnico

#4.1

09/24/1985

RPI 779

Publicação do pedido de patente

#3.1

07/19/1983

RPI 665

Pedido de patente depositado

#2.1

09/08/1982

RPI 620

Anuidade - prazo legal encerrado

#18.2

06/26/1990

RPI 1024

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