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Official data from INPI

COMPOSIÇÕES PARA CHAPAS DE AÇO CARBONO RESISTENTE Á CORROSÃO E COM BOAS CARACTERISTICA DE ESTAMPAGEM E PROCESSO DE OBTENÇÃO DAS MESMAS

ConcedidaInvention Patent

Application data

Number

PI8000898

Type

Invention Patent

Filing

02/14/1980

Publication

-

Progress at the INPI

  1. Filing02/14/80
  2. Publication
  3. Examination
  4. Allowance05/22/84
  5. Grant04/30/85
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 04/30/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Usinas Siderúrgicas de Minas Gerais - USIMINAS (Grupo Siderbrás)

MG, BR

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Inventors

A. J. (pessoa física)

A. T. (pessoa física)

P. Q. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/30/1985

RPI 758

Notificação para pagamento de retribuição

#13.1

09/04/1984

RPI 724

Deferimento

#9.1

05/22/1984

RPI 709

Exigência - art. 36 da LPI

#6.1

12/20/1983

RPI 687

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

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