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

VÁLVULAS PARA REDUZIR A PRESSÃO DE VAPOR D'ÁGUA E VÁLVULA CONDICIONADORA PARA PARA REDUZIR SIMULTANEAMENTE A PRESSÃO E TEMPERATURA DE VAPOR D'ÁGUA

Arquivada/ExtintaInvention PatentPCT · US1990002768

Application data

Number

PI9007607

Type

Invention Patent

Filing

05/21/1990

Publication

06/30/1992

PCT

US1990002768

Progress at the INPI

  1. Filing05/21/90
  2. Publication06/30/92
  3. Examination07/27/93
  4. Allowance06/14/94
  5. Grant03/01/95
  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

M. K. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

398.200 · 08/24/1989

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

03/01/1995

RPI 1265

Notificação para pagamento de retribuição

#13.1

10/18/1994

RPI 1246

Deferimento

#9.1

06/14/1994

RPI 1228

Solicitação de exame técnico

#4.1

07/27/1993

RPI 1182

Notificação de entrada na fase nacional - PCT

#1.3

06/30/1992

RPI 1126

Patent monitoring

Track this patent in real time.

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