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Official data from INPI

VÁLVULA HIDRÁULICA UNITÁRIA DE COMPENSAÇÃO DE PRESSÃO.

DeferidaInvention Patent

Application data

Number

PI8500652

Type

Invention Patent

Filing

02/12/1985

Publication

10/01/1985

Progress at the INPI

  1. Filing02/12/85
  2. Publication10/01/85
  3. Examination10/13/87
  4. Allowance10/03/89
  5. Grant02/13/91
  6. Expired07/15/08

The letters patent expired on 07/15/2008: 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: 10/03/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Husco International, Inc.

US

See this company's full portfolio

Inventors

R. W. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

579.394 · 02/13/1984

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Deferimento

#9.1

10/03/1989

RPI 989

Exigência - art. 36 da LPI

#6.1

05/09/1989

RPI 968

Solicitação de exame técnico

#4.1

10/13/1987

RPI 886

14.1

06/30/1987

RPI 871

Publicação do pedido de patente

#3.1

10/01/1985

RPI 780

Pedido de patente depositado

#2.1

05/07/1985

RPI 759

Carta-patente expirada

#21.1

Patente extinta em 12/02/2000

07/15/2008

RPI 1958

Concessão da patente

#16.1

02/13/1991

RPI 1054

110

11/13/1990

RPI 1041

Recurso

#12.1

04/10/1990

RPI 1013

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