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Official data from INPI

MATERIAL TUBULAR PARA EMPREGO NA PERFURAÇÃO E PRODUÇÃO DE POÇOS E PROCESOS DE SUPERVISÃO DE POÇOS DE PRODUÇÃO

Em AnáliseInvention Patent

Application data

Number

PI8703947

Type

Invention Patent

Filing

07/31/1987

Publication

02/14/1989

Progress at the INPI

  1. Filing07/31/87
  2. Publication02/14/89
  3. Examination06/11/91
  4. Allowance06/29/93
  5. Grant11/30/93
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 12/05/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Pangaea Enterprises, Inc

US

Inventors

H. C. (pessoa física)

US

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

14.1

12/05/1989

RPI 998

14.7

11/28/1989

RPI 997

Publicação do pedido de patente

#3.1

02/14/1989

RPI 956

Pedido de patente depositado

#2.1

10/20/1987

RPI 887

Republicação - classificação IPC

#15.11

As classificações anteriores eram: E21B 17/18, E21B 47/12, E21B 47/06.

08/28/2012

RPI 2173

Carta-patente expirada

#21.1

Patente extinta em 31/07/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

11/30/1993

RPI 1200

Deferimento

#9.1

06/29/1993

RPI 1178

Solicitação de exame técnico

#4.1

06/11/1991

RPI 1071

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