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Official data from INPI

PEDRA PRISMATICA DE MATERIAL REFRATARIO

ConcedidaInvention Patent

Application data

Number

PI8001001

Type

Invention Patent

Filing

02/20/1979

Publication

-

Progress at the INPI

  1. Filing02/20/79
  2. Publication
  3. Examination
  4. Allowance02/08/83
  5. Grant08/28/84
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 08/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

VEITSCHER MAGNESITWERKE AG

Inventors

H. J. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/28/1984

RPI 723

110

05/08/1984

RPI 707

Recurso

#12.1

05/24/1983

RPI 657

Deferimento

#9.1

02/08/1983

RPI 642

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

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