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Official data from INPI

CORPO CERAMICO SINTERIZADO E CARGA EM BRUTO E PROCESSO PARA PRODUZIR O MESMO

ConcedidaInvention Patent

Application data

Number

PI7603594

Type

Invention Patent

Filing

06/05/1975

Publication

-

Progress at the INPI

  1. Filing06/05/75
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  6. Expired08/03/93

The letters patent expired on 08/03/1993: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

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Latest action published by the INPI: 07/27/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CARBORUNDUM CO

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Inventors

C. J. (pessoa física)

H. L. (pessoa física)

M. C. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

11/10/1981

RPI 577

Carta-patente expirada

#21.1

08/03/1993

RPI 1183

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