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Official data from INPI

VÁLVULAS DE DIREÇÃO COM CENTRO FECHADO.

Arquivada/ExtintaInvention Patent

Application data

Number

PI7904924

Type

Invention Patent

Filing

08/01/1979

Publication

-

Progress at the INPI

  1. Filing08/01/79
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. Expired10/18/88

The letters patent expired on 10/18/1988: 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: 10/18/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Z. A. (pessoa física)

DE

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Inventors

H. H. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Priority claims

DE

P 28 34 421.0 · 08/05/1978

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

10/18/1988

RPI 939

Arquivamento - Art. 33 da LPI

#11.1

01/10/1984

RPI 690

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