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Official data from INPI

APARELHO OBTURADOR DE DOIS ELEMENTOS E PROCESSO DE TRATAR UMA ZONA SUBTERRÂNEA DE UM POÇO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9003458

Type

Invention Patent

Filing

07/17/1990

Publication

08/27/1991

Progress at the INPI

  1. Filing07/17/90
  2. Publication08/27/91
  3. Examination03/16/93
  4. Allowance06/07/94
  5. Grant12/27/94
  6. Expired05/25/10

The letters patent expired on 05/25/2010: 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: 05/25/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Halliburton Company

US

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Inventors

J. T. (pessoa física)

US

R. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

381,624 · 07/17/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 17/07/2005

05/25/2010

RPI 2055

Concessão da patente

#16.1

12/27/1994

RPI 1256

Notificação para pagamento de retribuição

#13.1

10/11/1994

RPI 1245

Deferimento

#9.1

06/07/1994

RPI 1227

Solicitação de exame técnico

#4.1

03/16/1993

RPI 1163

Publicação do pedido de patente

#3.1

08/27/1991

RPI 1082

Pedido de patente depositado

#2.1

01/22/1991

RPI 1051

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