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Official data from INPI

CIRCUITO DE CONVERSÃO DE FREQUÊNCIA

Prazo de SigiloInvention Patent

Application data

Number

PI8904188

Type

Invention Patent

Filing

08/21/1989

Publication

03/20/1990

Progress at the INPI

  1. Filing08/21/89
  2. Publication03/20/90
  3. Examination12/04/90
  4. Allowance06/09/98
  5. Grant11/24/98
  6. Expired12/26/12

The letters patent expired on 12/26/2012: 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: 11/28/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Sharp do Brasil S/A Indústria de Equipamentos Eletrônicos

AM, BR

Inventors

A. S. (pessoa física)

BR

Technical data

IPC Classification

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

11/28/1989

RPI 997

Carta-patente expirada

#21.1

Patente extinta em 21/08/2009

12/26/2012

RPI 2190

Concessão da patente

#16.1

11/24/1998

RPI 1455

Deferimento

#9.1

06/09/1998

RPI 1433

Solicitação de exame técnico

#4.1

12/04/1990

RPI 1044

Publicação antecipada

#3.2

03/20/1990

RPI 1010

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