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Official data from INPI

PROCESSO PARA AUMENTO DA VIDA ÚTIL DE CADINHOS DE ALTOS-FORNOS

PublicadaInvention Patent

Application data

Number

PI8705362

Type

Invention Patent

Filing

10/08/1987

Publication

04/25/1989

Progress at the INPI

  1. Filing10/08/87
  2. Publication04/25/89
  3. Examination01/22/91
  4. Allowance09/05/95
  5. Grant04/30/96
  6. Expired07/29/08

The letters patent expired on 07/29/2008: 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: 04/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais S/A - Usiminas

MG, BR

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Inventors

F. G. (pessoa física)

BR

M. C. (pessoa física)

BR

M. C. (pessoa física)

BR

Technical data

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Publicação do pedido de patente

#3.1

04/25/1989

RPI 966

Pedido de patente depositado

#2.1

11/08/1988

RPI 942

Carta-patente expirada

#21.1

Patente extinta em 08/10/2002

07/29/2008

RPI 1960

Concessão da patente

#16.1

04/30/1996

RPI 1326

Deferimento

#9.1

09/05/1995

RPI 1292

Exigência - art. 36 da LPI

#6.1

06/21/1994

RPI 1229

Solicitação de exame técnico

#4.1

01/22/1991

RPI 1051

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