(11) 98705-3426
TrademarkIQ iconTrademarkIQ
Back to search
Official data from INPI

Válvula de recirculação de baixa pressão

Arquivada/ExtintaInvention PatentPCT · US1990002762

Application data

Number

PI9007406

Type

Invention Patent

Filing

05/21/1990

Publication

06/16/1992

PCT

US1990002762

Progress at the INPI

  1. Filing05/21/90
  2. Publication06/16/92
  3. Examination04/20/93
  4. Allowance06/04/96
  5. Grant04/29/97
  6. Expired06/15/10

The letters patent expired on 06/15/2010: 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: 06/15/2010. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Keystone International Holdings Corp

US

See this company's full portfolio

Inventors

G. L. (pessoa física)

US

H. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

359.134 · 05/31/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 21/05/2005

06/15/2010

RPI 2058

Concessão da patente

#16.1

04/29/1997

RPI 1378

Deferimento

#9.1

06/04/1996

RPI 1331

4.1.1

06/15/1993

RPI 1176

Solicitação de exame técnico

#4.1

05/04/1993

RPI 1170

Solicitação de exame técnico

#4.1

04/20/1993

RPI 1168

Notificação de entrada na fase nacional - PCT

#1.3

06/16/1992

RPI 1124

Patent monitoring

Track this patent in real time.

Receive alerts on INPI events, decisions, and expiry dates for your portfolio.