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Official data from INPI

PROCESSO PARA A PREPARACAO DE UM TIJOLO DE MAGNESIACARBONO E PRODUTO RESULTANTE

ConcedidaInvention Patent

Application data

Number

PI7805176

Type

Invention Patent

Filing

08/12/1977

Publication

-

Progress at the INPI

  1. Filing08/12/77
  2. Publication
  3. Examination
  4. Allowance08/16/83
  5. Grant01/31/84
  6. Expired05/03/94

The letters patent expired on 05/03/1994: 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: 01/31/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

KUROSAKI REFRACTORIES CO

Inventors

K. F. (pessoa física)

Y. F. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

01/31/1984

RPI 693

Notificação para pagamento de retribuição

#13.1

12/06/1983

RPI 685

Deferimento

#9.1

08/16/1983

RPI 669

Exigência - art. 36 da LPI

#6.1

10/19/1982

RPI 626

6.2

12/22/1981

RPI 583

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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