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Official data from INPI

OBTURADOR DE EMPANQUE PARA USO EM UM FURO DE POÇO E FERRAMENTA PARA FUNDO DE FURO

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004023

Type

Invention Patent

Filing

08/14/1990

Publication

11/12/1991

Progress at the INPI

  1. Filing08/14/90
  2. Publication11/12/91
  3. Examination03/24/92
  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

See this company's full portfolio

Inventors

D. W. (pessoa física)

US

K. C. (pessoa física)

US

T. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

494,718 · 03/16/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 14/08/2005

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

03/24/1992

RPI 1112

Publicação do pedido de patente

#3.1

11/12/1991

RPI 1093

Pedido de patente depositado

#2.1

02/19/1991

RPI 1055

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