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Official data from INPI

APERFEICOAMENTOS EM CELULA DE COMBUSTIVEL E EM PROCESSO PARA SUA FABRICACAO

Arquivada/ExtintaInvention Patent
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Application data

Number

PI7500187

Type

Invention Patent

Filing

01/15/1974

Publication

-
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Progress at the INPI

  1. Filing01/15/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant
  6. Expired08/03/93

The letters patent expired on 08/03/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 08/03/1993. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

UNITED AIRCRAFT CORP

Inventors

T. J. (pessoa física)

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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