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Official data from INPI

CONJUNTO DE DESIDRATACAO PARA DESIDRATAR AR ATMOSFERICO PARA USO NA OPERACAO DE UM ALTO-FORNO

ConcedidaInvention Patent

Application data

Number

PI7605384

Type

Invention Patent

Filing

08/17/1976

Publication

-

Progress at the INPI

  1. Filing08/17/76
  2. Publication
  3. Examination
  4. Allowance
  5. Grant05/31/83
  6. Expired07/20/93

The letters patent expired on 07/20/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

NIPPON STEEL CORP

T. E. (pessoa física)

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Inventors

H. K. (pessoa física)

N. K. (pessoa física)

S. K. (pessoa física)

Y. T. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

11.8

05/03/1983

RPI 654

Arquivamento - Art. 38 §2° da LPI

#11.4

03/15/1983

RPI 647

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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