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Official data from INPI

FILTRO DE ESPUMA DE CERAMICA E PROCESSO PARA PREPARAR UMA ESPUMA DE CERAMICA

Em AnáliseInvention Patent

Application data

Number

PI7601848

Type

Invention Patent

Filing

07/21/1975

Publication

-

Progress at the INPI

  1. Filing07/21/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant01/26/82
  6. Expired08/03/93

The letters patent expired on 08/03/1993: 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: 07/04/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ALUSUISSE [CH]

Inventors

D. J. (pessoa física)

G. T. (pessoa física)

P. R. (pessoa física)

P. M. (pessoa física)

Y. J. (pessoa física)

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

18.1

07/04/1989

RPI 976

Concessão da patente

#16.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

22.2

03/31/1992

RPI 1113

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