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Official data from INPI

VÁLVULA REGULADORA DE GÁS COM COMPENSAÇÃO DE QUEDA DE PRESSÃO.

PublicadaInvention Patent

Application data

Number

PI8900897

Type

Invention Patent

Filing

02/27/1989

Publication

10/24/1989

Progress at the INPI

  1. Filing02/27/89
  2. Publication10/24/89
  3. Examination10/15/91
  4. Allowance10/06/92
  5. Grant05/25/93
  6. Expired12/15/09

The letters patent expired on 12/15/2009: 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: 10/24/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Fisher Controls International, Inc.

US

See this company's full portfolio

Inventors

D. R. (pessoa física)

US

M. H. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

161.860 · 02/29/1988

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

10/24/1989

RPI 992

Pedido de patente depositado

#2.1

04/11/1989

RPI 964

Carta-patente expirada

#21.1

Patente extinta em 27/02/2004

12/15/2009

RPI 2032

Concessão da patente

#16.1

05/25/1993

RPI 1173

Notificação para pagamento de retribuição

#13.1

03/02/1993

RPI 1161

Deferimento

#9.1

10/06/1992

RPI 1140

Solicitação de exame técnico

#4.1

10/15/1991

RPI 1089

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