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Official data from INPI

VÁLVULA DE FREIO DOSADORA COM PISTÃO SECUNDÁRIO DE DUPLO CIRCUITO

PublicadaInvention Patent

Application data

Number

PI8702000

Type

Invention Patent

Filing

04/02/1987

Publication

02/02/1988

Progress at the INPI

  1. Filing04/02/87
  2. Publication02/02/88
  3. Examination08/28/90
  4. Allowance06/25/91
  5. Grant05/26/92
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 02/02/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. C. (pessoa física)

US

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Inventors

M. S. (pessoa física)

US

R. B. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

848.015 · 04/03/1986

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

02/02/1988

RPI 902

Pedido de patente depositado

#2.1

07/28/1987

RPI 875

Carta-patente expirada

#21.1

Patente extinta em 02/04/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

05/26/1992

RPI 1121

Republicação - classificação IPC

#15.11

11/19/1991

RPI 1094

Notificação para pagamento de retribuição

#13.1

10/22/1991

RPI 1090

Deferimento

#9.1

06/25/1991

RPI 1073

Solicitação de exame técnico

#4.1

08/28/1990

RPI 1030

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