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Official data from INPI

SISTEMA DE DIRECAO APERFEICOADO

ConcedidaInvention Patent

Application data

Number

PI7500643

Type

Invention Patent

Filing

02/07/1974

Publication

-

Progress at the INPI

  1. Filing02/07/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant11/10/81
  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: 11/10/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

TRW INC

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Inventors

R. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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