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Official data from INPI

FERRAMENTA E PROCESSO DE PERFILAGEM DE POÇO PARA LIMITAÇÃO DE FLUXO

PublicadaInvention Patent

Application data

Number

PI8803210

Type

Invention Patent

Filing

06/29/1988

Publication

01/17/1989

Progress at the INPI

  1. Filing06/29/88
  2. Publication01/17/89
  3. Examination03/12/91
  4. Allowance01/18/94
  5. Grant06/28/94
  6. Expired09/02/08

The letters patent expired on 09/02/2008: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 01/17/1989. 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

G. P. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

068.983 · 07/01/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

01/17/1989

RPI 952

Pedido de patente depositado

#2.1

11/29/1988

RPI 945

Carta-patente expirada

#21.1

Patente extinta em 29/06/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

06/28/1994

RPI 1230

Deferimento

#9.1

01/18/1994

RPI 1207

6.2

03/16/1993

RPI 1163

Solicitação de exame técnico

#4.1

03/12/1991

RPI 1058

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