Official data from INPI

CIRCUITO E METODO PARA MODIFICAR A FAIXA DINÂMICA DE UM SINAL DE ÁUDIO

Arquivada/ExtintaInvention PatentPCT · US1990001804

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Application data

Number

PI9007263

Type

Invention Patent

Filing

04/03/1990

Publication

03/17/1992

PCT

US1990001804

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Progress at the INPI

Filing04/03/90
Publication03/17/92
Examination06/01/93
Allowance09/08/98
Grant02/23/99
Expired01/08/13

The letters patent expired on 01/08/2013: 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: 01/08/2013. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

D. C. (pessoa física)

R. D. (pessoa física)

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Inventors

R. D. (pessoa física)

S. C. (pessoa física)

Technical data

IPC Classification

H03G 9/02 H03G 9/18

Priority claims

333.431 · 04/03/1989

428.363 · 10/27/1989

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Carta-patente expirada

#21.1

Patente extinta em 03/04/2010

01/08/2013

RPI 2192

Transferência deferida

#25.1

Transferido de: Ray Milton Dolby

02/21/2007

RPI 1885

Concessão da patente

#16.1

02/23/1999

RPI 1468

Deferimento

#9.1

09/08/1998

RPI 1446

Exigência - art. 36 da LPI

#6.1

05/05/1998

RPI 1428

Solicitação de exame técnico

#4.1

06/01/1993

RPI 1174

Notificação de entrada na fase nacional - PCT

#1.3

03/17/1992

RPI 1111

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