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Official data from INPI

PROCESSO DE PREPARACAO DE LIGAS FERROSAS PERMITINDO REDUZIR OU SUPRIMIR ALGUNS DEFEITOS DAS REFERIDAS LIGAS E LIGAS FERROSAS PREPARADAS PELO MESMO

ConcedidaInvention Patent

Application data

Number

PI7902098

Type

Invention Patent

Filing

04/06/1978

Publication

-

Progress at the INPI

  1. Filing04/06/78
  2. Publication
  3. Examination11/10/81
  4. Allowance08/07/84
  5. Grant02/26/85
  6. 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.

Talk to a specialist

Latest action published by the INPI: 02/26/1985. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

U. E. (pessoa física)

Inventors

G. M. (pessoa física)

V. D. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/26/1985

RPI 749

Notificação para pagamento de retribuição

#13.1

12/11/1984

RPI 738

Deferimento

#9.1

08/07/1984

RPI 720

Exigência - art. 36 da LPI

#6.1

02/14/1984

RPI 695

Solicitação de exame técnico

#4.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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