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Official data from INPI

INSTRUMENTO PARA INSERÇÃO EM UM FURO DO POÇO

Arquivada/ExtintaInvention PatentPCT · US1990000538

Application data

Number

PI9004927

Type

Invention Patent

Filing

01/31/1990

Publication

08/06/1991

PCT

US1990000538

Progress at the INPI

  1. Filing01/31/90
  2. Publication08/06/91
  3. Examination03/30/93
  4. Allowance03/07/95
  5. Grant09/26/95
  6. Expired06/01/10

The letters patent expired on 06/01/2010: 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: 06/01/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Atlantic Richfield Company

US

See this company's full portfolio

Inventors

L. S. (pessoa física)

US

M. C. (pessoa física)

US

R. I. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

305,250 · 02/01/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 31/01/2005

06/01/2010

RPI 2056

Concessão da patente

#16.1

09/26/1995

RPI 1295

Deferimento

#9.1

03/07/1995

RPI 1266

Exigência - art. 36 da LPI

#6.1

10/25/1994

RPI 1247

6.2

07/05/1994

RPI 1231

Solicitação de exame técnico

#4.1

03/30/1993

RPI 1165

Notificação de entrada na fase nacional - PCT

#1.3

08/06/1991

RPI 1079

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