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Official data from INPI

PROCESSO PARA BENEFICIAMENTO DE LIGAS ANTIFRICCAO DE REVESTIMENTO DE TIRAS DE ACO,AS TIRAS COMPOSTAS BENEFICIADAS E PRODUTOS OBTIDOS COM TAIS TIRAS

ConcedidaInvention Patent
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Application data

Number

PI7806091

Type

Invention Patent

Filing

09/15/1978

Publication

-
View on INPI

Progress at the INPI

  1. Filing09/15/78
  2. Publication
  3. Examination03/16/82
  4. Allowance03/27/84
  5. Grant11/27/84
  6. Expired05/03/94

The letters patent expired on 05/03/1994: 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: 11/27/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

METAL LEVE SA IND COM

Inventors

M. D. (pessoa física)

P. A. (pessoa física)

Technical data

IPC Classification

C21D 1/09

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

07/17/1984

RPI 717

Deferimento

#9.1

03/27/1984

RPI 701

Exigência - art. 36 da LPI

#6.1

09/06/1983

RPI 672

Exigência - art. 36 da LPI

#6.1

01/11/1983

RPI 638

Solicitação de exame técnico

#4.1

03/16/1982

RPI 595

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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