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Official data from INPI

SEM TITULO

Em AnáliseInvention Patent

Application data

Number

PI7405311

Type

Invention Patent

Filing

06/27/1974

Publication

-

Progress at the INPI

  1. Filing06/27/74
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/29/80
  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: 06/26/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Tetsudo Kizai Kogyo Company Limited

JP

Inventors

E. B. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Cessão de direito de exploração

#22.1

06/26/1984

RPI 714

Concessão da patente

#16.1

04/29/1980

RPI 497

Carta-patente expirada

#21.1

11/24/1992

RPI 1147

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