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Official data from INPI

PASTA CARBINADA DE ARGAMASSAMENTO APTA A SER USADA A FRIO,PROCESSO PARA REALIZACAO DE GUARNICOES CARBONADAS,E APLICACOES DO DITO PROCESSO

ConcedidaInvention Patent
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Application data

Number

PI7902420

Type

Invention Patent

Filing

04/20/1978

Publication

-
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Progress at the INPI

  1. Filing04/20/78
  2. Publication
  3. Examination
  4. Allowance09/08/87
  5. Grant04/26/88
  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.

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Latest action published by the INPI: 04/26/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ELECTRODES & REFRACTAIRES

Inventors

D. D. (pessoa física)

L. S. (pessoa física)

V. J. (pessoa física)

Technical data

IPC Classification

C04B 35/52C25C 3/06C25C 3/08

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/26/1988

RPI 914

Notificação para pagamento de retribuição

#13.1

01/26/1988

RPI 901

Deferimento

#9.1

09/08/1987

RPI 881

Exigência - art. 36 da LPI

#6.1

06/04/1985

RPI 763

Exigência - art. 36 da LPI

#6.1

07/17/1984

RPI 717

Exigência - art. 36 da LPI

#6.1

11/30/1982

RPI 632

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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