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Official data from INPI

PEDRA DE MAGNESIA CALCINADA,RESISTENTE AS CHAMAS E PROCESSO PARA A SUA PREPARACAO

Concessão AnuladaInvention Patent

Application data

Number

PI7607000

Type

Invention Patent

Filing

10/20/1975

Publication

-

Progress at the INPI

  1. Filing10/20/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant04/24/84
  6. Expired07/27/93

The letters patent expired on 07/27/1993: 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: 07/24/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

VEITSCHER MAGNESITWERKE AG

Inventors

G. H. (pessoa física)

N. H. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

16.3

07/24/1984

RPI 718

Concessão da patente

#16.1

04/24/1984

RPI 705

Notificação para pagamento de retribuição

#13.1

01/31/1984

RPI 693

110

09/27/1983

RPI 675

Notificação para pagamento de retribuição

#13.1

10/27/1981

RPI 575

Carta-patente expirada

#21.1

07/27/1993

RPI 1182

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