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Official data from INPI

DISPOSITIVO PROTETOR DE ISQUEIROS ELETRICOS CONTRA AQUECIMENTO EXCESSIVO

Em AnáliseInvention Patent

Application data

Number

PI7500838

Type

Invention Patent

Filing

05/20/1974

Publication

-

Progress at the INPI

  1. Filing05/20/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  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.

Talk to a specialist

Latest action published by the INPI: 07/02/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

SCHOELLER & CO

Inventors

A. G. (pessoa física)

S. G. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

07/02/1985

RPI 767

Concessão da patente

#16.1

07/27/1982

RPI 614

110

02/16/1982

RPI 591

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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