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Official data from INPI

PROTETOR DE VÁLVULA

Arquivada/ExtintaInvention Patent
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Application data

Number

PI9002501

Type

Invention Patent

Filing

05/28/1990

Publication

08/13/1991
View on INPI

Progress at the INPI

  1. Filing05/28/90
  2. Publication08/13/91
  3. Examination06/02/92
  4. Allowance03/15/94
  5. Grant11/29/94
  6. Expired05/18/10

The letters patent expired on 05/18/2010: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 05/18/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Praxair Canada, Inc.

CA

Union Carbide Canada Limited

CA

Inventors

J. P. (pessoa física)

CA

Technical data

IPC Classification

F16K 25/00

Priority claims

CA

600.623 · 05/26/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 28/05/2005

05/18/2010

RPI 2054

Concessão da patente

#16.1

11/29/1994

RPI 1252

Notificação para pagamento de retribuição

#13.1

06/28/1994

RPI 1230

Deferimento

#9.1

03/15/1994

RPI 1215

14.4

07/27/1993

RPI 1182

14.4

07/20/1993

RPI 1181

Solicitação de exame técnico

#4.1

06/02/1992

RPI 1122

Publicação do pedido de patente

#3.1

08/13/1991

RPI 1080

Pedido de patente depositado

#2.1

10/09/1990

RPI 1036

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