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Official data from INPI

VÁLVULA DE FLUXO PROPORCIONAL

Arquivada/ExtintaInvention Patent

Application data

Number

PI9004427

Type

Invention Patent

Filing

09/06/1990

Publication

09/10/1991

Progress at the INPI

  1. Filing09/06/90
  2. Publication09/10/91
  3. Examination03/17/92
  4. Allowance03/15/94
  5. Grant11/29/94
  6. Expired06/01/10

The letters patent expired on 06/01/2010: 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: 03/27/2018. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Automatic Switch Company

US

See this company's full portfolio

Inventors

D. L. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

404.945 · 09/08/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: F16K 31/02; F16K 21/00; B67D 5/04.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

Patente extinta em 06/09/2005

06/01/2010

RPI 2056

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

Solicitação de exame técnico

#4.1

03/17/1992

RPI 1111

Publicação do pedido de patente

#3.1

09/10/1991

RPI 1084

Pedido de patente depositado

#2.1

03/12/1991

RPI 1058

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