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Official data from INPI

OBTURADOR DE ALTA TEMPERATURA PARA TUBULAÇÕES DE POÇO E MECANISMO DE RETENÇÃO DE DESLIZAMENTO PARA OBTURADOR DE POÇO SUBTERRÂNEO

PublicadaInvention Patent

Application data

Number

PI8605957

Type

Invention Patent

Filing

12/04/1986

Publication

09/15/1987

Progress at the INPI

  1. Filing12/04/86
  2. Publication09/15/87
  3. Examination05/01/90
  4. Allowance11/27/90
  5. Grant06/25/91
  6. Terminated10/03/95

The patent was granted on 06/25/1991 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: 09/15/1987. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Baker Oil Tools, Inc.

US

Inventors

D. J. (pessoa física)

US

D. R. (pessoa física)

US

M. L. (pessoa física)

US

Y. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

805.882 · 12/06/1985

US

806.030 · 12/06/1985

US

806.031 · 12/06/1985

US

811.093 · 12/19/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

09/15/1987

RPI 882

Pedido de patente depositado

#2.1

04/22/1987

RPI 861

Anuidade - prazo legal encerrado

#18.2

10/03/1995

RPI 1296

Concessão da patente

#16.1

06/25/1991

RPI 1073

Notificação para pagamento de retribuição

#13.1

03/12/1991

RPI 1058

Deferimento

#9.1

11/27/1990

RPI 1043

Solicitação de exame técnico

#4.1

05/01/1990

RPI 1016

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