Official data from INPI

SEM TITULO

ConcedidaInvention Patent

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Application data

Number

PI8009075

Type

Invention Patent

Filing

12/19/1980

Publication

04/06/1982

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Progress at the INPI

Filing12/19/80
Publication04/06/82
Examination09/28/82
Allowance05/22/84
Grant11/27/84
Expired03/19/96

The letters patent expired on 03/19/1996: 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: 11/27/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Ikosa Industria de Aço Korf S/A.

RJ, BR

Inventors

W. R. (pessoa física)

W. W. (pessoa física)

Technical data

IPC Classification

C21C 5/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

11/27/1984

RPI 736

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/22/1984

RPI 709

14.1

01/10/1984

RPI 690

Solicitação de exame técnico

#4.1

09/28/1982

RPI 623

Notificação de entrada na fase nacional - PCT

#1.3

04/06/1982

RPI 598

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

20.4

07/24/1990

RPI 1025

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