Official data from INPI

DISPOSITIVO DE TROCAS TÉRMICAS PARA O ARREFECIMENTO DE UMA PAREDE DE ALTO FORNO.

ConcedidaInvention Patent

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Application data

Number

PI8101976

Type

Invention Patent

Filing

04/01/1981

Publication

10/06/1981

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Progress at the INPI

Filing04/01/81
Publication10/06/81
Examination06/15/82
Allowance10/23/84
Grant04/30/85
Expired10/01/96

The letters patent expired on 10/01/1996: 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: 04/30/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

F. T. (pessoa física)

Inventors

T. [. (pessoa física)

Technical data

IPC Classification

C21B 7/10

Priority claims

80 07506 · 04/02/1980

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/30/1985

RPI 758

Deferimento

#9.1

10/23/1984

RPI 731

Exigência - art. 36 da LPI

#6.1

05/08/1984

RPI 707

Solicitação de exame técnico

#4.1

06/15/1982

RPI 608

Publicação do pedido de patente

#3.1

10/06/1981

RPI 572

Carta-patente expirada

#21.1

10/01/1996

RPI 1348

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