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Official data from INPI

CONJUNTO DE OBTURADOR E FERRAMENTA DE SERVIÇO.

Em AnáliseInvention Patent

Application data

Number

PI8604329

Type

Invention Patent

Filing

09/10/1986

Publication

05/12/1987

Progress at the INPI

  1. Filing09/10/86
  2. Publication05/12/87
  3. Examination08/15/89
  4. Allowance05/29/90
  5. Grant11/27/90
  6. Terminated10/03/95

The patent was granted on 11/27/1990 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: 08/15/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Dowell Schlumberger Inc.

US

Inventors

H. M. (pessoa física)

US

J. S. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

774.979 · 09/11/1985

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Solicitação de exame técnico

#4.1

08/15/1989

RPI 982

Publicação do pedido de patente

#3.1

05/12/1987

RPI 864

Pedido de patente depositado

#2.1

03/17/1987

RPI 856

Anuidade - prazo legal encerrado

#18.2

10/03/1995

RPI 1296

Concessão da patente

#16.1

11/27/1990

RPI 1043

Notificação para pagamento de retribuição

#13.1

09/04/1990

RPI 1031

Deferimento

#9.1

05/29/1990

RPI 1020

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