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Official data from INPI

APARELHO PARA USO NA OPERAÇÃO DE UMA FERRAMENTA DE POÇO DE FURO DESCENDENTE TENDO UM ELEMENTO SENSÍVEL Á PRESSÃO, E PROCESSO PARA CONTROLAR TAL OPERAÇÃO

Prazo de SigiloInvention Patent

Application data

Number

PI8902380

Type

Invention Patent

Filing

05/24/1989

Publication

01/16/1990

Progress at the INPI

  1. Filing05/24/89
  2. Publication01/16/90
  3. Examination10/23/90
  4. Allowance06/07/94
  5. Grant12/27/94
  6. Expired12/22/09

The letters patent expired on 12/22/2009: 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: 07/04/1989. 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

J. U. (pessoa física)

US

Technical data

Priority claims

US

198.968 · 05/26/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/04/1989

RPI 976

Carta-patente expirada

#21.1

Patente extinta em 24/05/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

12/27/1994

RPI 1256

Deferimento

#9.1

06/07/1994

RPI 1227

Solicitação de exame técnico

#4.1

10/23/1990

RPI 1038

Publicação do pedido de patente

#3.1

01/16/1990

RPI 1002

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