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Official data from INPI

DISPOSITIVO PARA O RECONHECIMENTO DE UMA FREQUENCIA

Em AnáliseInvention Patent
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Application data

Number

PI7803730

Type

Invention Patent

Filing

06/10/1977

Publication

-
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Progress at the INPI

  1. Filing06/10/77
  2. Publication
  3. Examination
  4. Allowance04/13/82
  5. Grant
  6. Expired11/30/93

The letters patent expired on 11/30/1993: 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: 12/06/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

C. A. (pessoa física)

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Inventors

No inventors listed.

Technical data

IPC Classification

No IPC classification.

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

12/06/1988

RPI 946

Pedido de licença compulsória

#20.1

11/29/1988

RPI 945

20.4

11/22/1988

RPI 944

Notificação para pagamento de retribuição

#13.1

08/03/1982

RPI 615

Deferimento

#9.1

04/13/1982

RPI 599

Exigência - art. 36 da LPI

#6.1

11/03/1981

RPI 576

Carta-patente expirada

#21.1

11/30/1993

RPI 1200

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