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Official data from INPI

PROCESSO PARA A PRODUCAO DE FIBRAS DE OXIDOS POLICRISTALINOS

ConcedidaInvention Patent

Application data

Number

PI7704824

Type

Invention Patent

Filing

07/23/1976

Publication

-

Progress at the INPI

  1. Filing07/23/76
  2. Publication
  3. Examination
  4. Allowance02/08/83
  5. Grant08/30/83
  6. Expired07/13/93

The letters patent expired on 07/13/1993: 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: 08/30/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CARBORUNDUM CO

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Inventors

M. K. (pessoa física)

N. N. (pessoa física)

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/30/1983

RPI 671

Notificação para pagamento de retribuição

#13.1

06/07/1983

RPI 659

Deferimento

#9.1

02/08/1983

RPI 642

Conhecimento de parecer técnico

#7.1

01/12/1982

RPI 586

Carta-patente expirada

#21.1

07/13/1993

RPI 1180

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