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Official data from INPI

DISPOSITIVO DE VÁLVULA

Arquivada/ExtintaInvention PatentPCT · NO1991000021

Application data

Number

PI9104469

Type

Invention Patent

Filing

02/15/1991

Publication

04/21/1992

PCT

NO1991000021

Progress at the INPI

  1. Filing02/15/91
  2. Publication04/21/92
  3. Examination11/16/93
  4. Allowance03/28/95
  5. Grant10/31/95
  6. Expired06/29/10

The letters patent expired on 06/29/2010: 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: 06/29/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Liaaen Engineering A/S

NO

Norske Shell A/S

NO

Inventors

O. K. (pessoa física)

NO

Technical data

IPC Classification

Priority claims

NO

900754 · 02/16/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 15/02/2006

06/29/2010

RPI 2060

Concessão da patente

#16.1

10/31/1995

RPI 1300

Deferimento

#9.1

03/28/1995

RPI 1269

Solicitação de exame técnico

#4.1

11/16/1993

RPI 1198

Notificação de entrada na fase nacional - PCT

#1.3

04/21/1992

RPI 1116

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