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Official data from INPI

DISPOSITIVO DE VALVULA TRIPLA OPERADO POR PRESSAO DE FLUIDO;E DISPOSITIVO DE VALVULA OPERADO POR PRESSAO DE FLUIDO

Em AnáliseInvention Patent

Application data

Number

PI7702067

Type

Invention Patent

Filing

04/05/1976

Publication

-

Progress at the INPI

  1. Filing04/05/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant12/29/81
  6. Terminated03/20/84

The patent was granted on 12/29/1981 and later terminated for failure to pay the annuities. The technology is in the public domain in Brazil.

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Latest action published by the INPI: 03/20/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

WESTINGHOUSE AIR BRAKE CO

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Inventors

W. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Anuidade - prazo legal encerrado

#18.2

03/20/1984

RPI 700

Concessão da patente

#16.1

12/29/1981

RPI 584

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