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Official data from INPI

SEM TITULO

Em AnáliseInvention Patent

Application data

Number

PI7407403

Type

Invention Patent

Filing

09/05/1974

Publication

-

Progress at the INPI

  1. Filing09/05/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant09/29/81
  6. Expired11/24/92

The letters patent expired on 11/24/1992: 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: 11/24/1981. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Western Electric Company Incorporated

US

Inventors

E. B. (pessoa física)

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

15.0

11/24/1981

RPI 579

Concessão da patente

#16.1

09/29/1981

RPI 571

Republicação - classificação IPC

#15.11

Procedimento automático de reclassificação. As classificações IPC anteriores eram: B23K 3/04; B23P 3/12.

03/27/2018

RPI 2464

Carta-patente expirada

#21.1

11/24/1992

RPI 1147

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