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Official data from INPI

PROCESSO PARA A PRODUCAO DE TIJOLOS REFRATARIOS QUEIMADOS

ConcedidaInvention Patent

Application data

Number

PI7606607

Type

Invention Patent

Filing

10/03/1975

Publication

-

Progress at the INPI

  1. Filing10/03/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant03/27/84
  6. Expired07/20/93

The letters patent expired on 07/20/1993: 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: 03/27/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

VEITSCHER MAGNESITWERKE AG

Inventors

G. H. (pessoa física)

H. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

03/27/1984

RPI 701

133

12/27/1983

RPI 688

110

11/16/1983

RPI 682

120

06/07/1983

RPI 659

Recurso

#12.1

11/17/1981

RPI 578

Carta-patente expirada

#21.1

07/20/1993

RPI 1181

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