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Official data from INPI

LIGA RESISTENTE AO CALOR

ConcedidaInvention Patent

Application data

Number

PI7802753

Type

Invention Patent

Filing

05/03/1978

Publication

-

Progress at the INPI

  1. Filing05/03/78
  2. Publication
  3. Examination
  4. Allowance03/01/83
  5. Grant06/21/83
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 06/21/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

A. C. (pessoa física)

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Inventors

H. B. (pessoa física)

H. D. (pessoa física)

Technical data

Priority claims

US

793.848 · 05/04/1977

US

824.637 · 08/15/1977

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

06/21/1983

RPI 661

Deferimento

#9.1

03/01/1983

RPI 645

6.2

12/15/1981

RPI 582

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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