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Official data from INPI

PROCESSO E SISTEMA DE COMPENSAR VARIAÇÕES NA FREQUÊNCIA DE LINHA DE ENTRADA EM RELAÇÃO A UMA FREQUÊNCIA DE LINHA NOMINAL.

Arquivada/ExtintaInvention Patent

Application data

Number

PI9103733

Type

Invention Patent

Filing

08/29/1991

Publication

08/04/1992

Progress at the INPI

  1. Filing08/29/91
  2. Publication08/04/92
  3. Examination10/18/94
  4. Allowance07/27/99
  5. Grant12/28/99
  6. Expired06/04/13

The letters patent expired on 06/04/2013: 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: 06/04/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

X. C. (pessoa física)

US

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Inventors

B. R. (pessoa física)

US

Technical data

IPC Classification

Priority claims

US

07/632,969 · 12/24/1990

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinte em 29/08/2011

06/04/2013

RPI 2213

Concessão da patente

#16.1

12/28/1999

RPI 1512

Deferimento

#9.1

07/27/1999

RPI 1490

Exigência - art. 36 da LPI

#6.1

11/17/1998

RPI 1454

Solicitação de exame técnico

#4.1

10/18/1994

RPI 1246

Publicação do pedido de patente

#3.1

08/04/1992

RPI 1131

Pedido de patente depositado

#2.1

10/08/1991

RPI 1088

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