Official data from INPI

PROCESSO E INSTALACAO DE TRATAMENTO E DE MANUTENCAO DE ESCORIA METALURGICA

ConcedidaInvention Patent

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Application data

Number

PI7902352

Type

Invention Patent

Filing

04/18/1978

Publication

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Progress at the INPI

Filing04/18/78
Publication
Examination
Allowance09/21/82
Grant05/31/83
Expired06/21/94

The letters patent expired on 06/21/1994: 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

SIDMAR

SIDMAR NV

Inventors

M. G. (pessoa física)

Technical data

IPC Classification

C21B 3/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

01/25/1983

RPI 640

Deferimento

#9.1

09/21/1982

RPI 622

Exigência - art. 36 da LPI

#6.1

03/30/1982

RPI 597

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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