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Official data from INPI

ESCORIA DE FERROCROMO PARA USOS REQUERENDO REFRATARIEDADE E RESISTENCIA MECANICA

ConcedidaInvention Patent

Application data

Number

PI7902338

Type

Invention Patent

Filing

04/18/1978

Publication

-

Progress at the INPI

  1. Filing04/18/78
  2. Publication
  3. Examination
  4. Allowance10/27/87
  5. Grant05/31/88
  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.

Talk to a specialist

Latest action published by the INPI: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

OUTOKUMPU OY

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Inventors

H. M. (pessoa física)

K. H. (pessoa física)

T. F. (pessoa física)

V. M. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

03/01/1988

RPI 906

Deferimento

#9.1

10/27/1987

RPI 888

Exigência - art. 36 da LPI

#6.1

06/23/1987

RPI 870

Exigência - art. 36 da LPI

#6.1

04/16/1985

RPI 756

Exigência - art. 36 da LPI

#6.1

03/20/1984

RPI 700

Carta-patente expirada

#21.1

06/21/1994

RPI 1229

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