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Official data from INPI

VALVULA DE DESCARGA POR PRESSAO

Em AnáliseInvention Patent

Application data

Number

PI7607172

Type

Invention Patent

Filing

01/31/1976

Publication

-

Progress at the INPI

  1. Filing01/31/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant08/30/83
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 07/16/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. S. (pessoa física)

Inventors

B. W. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.7

07/16/1985

RPI 769

Concessão da patente

#16.1

08/30/1983

RPI 671

110

05/24/1983

RPI 657

Republicação - classificação IPC

#15.11

05/24/1983

RPI 657

Recurso

#12.1

12/22/1981

RPI 583

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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