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Official data from INPI

VÁLVULA DE PERDA DE REFRIGERANTE

PublicadaInvention Patent

Application data

Number

PI8803757

Type

Invention Patent

Filing

07/28/1988

Publication

03/07/1989

Progress at the INPI

  1. Filing07/28/88
  2. Publication03/07/89
  3. Examination04/02/91
  4. Allowance11/23/93
  5. Grant06/28/94
  6. Expired09/02/08

The letters patent expired on 09/02/2008: 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: 03/07/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

P. C. (pessoa física)

US

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Inventors

R. S. (pessoa física)

US

R. M. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

078,617 · 07/28/1987

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

03/07/1989

RPI 959

Pedido de patente depositado

#2.1

01/03/1989

RPI 950

Carta-patente expirada

#21.1

Patente extinta em 28/07/2003

09/02/2008

RPI 1965

Concessão da patente

#16.1

06/28/1994

RPI 1230

Deferimento

#9.1

11/23/1993

RPI 1199

Exigência - art. 36 da LPI

#6.1

06/01/1993

RPI 1174

Solicitação de exame técnico

#4.1

04/02/1991

RPI 1061

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