Official data from INPI

CONVERSOR DE FASE

Prazo de SigiloInvention Patent

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Application data

Number

PI8902584

Type

Invention Patent

Filing

06/05/1989

Publication

12/18/1990

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Progress at the INPI

Filing06/05/89
Publication12/18/90
Examination07/30/91
Allowance09/13/94
Grant06/27/95
Expired12/22/09

The letters patent expired on 12/22/2009: 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: 07/11/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

R. F. (pessoa física)

SP, BR

Inventors

R. F. (pessoa física)

Technical data

IPC Classification

H02M 5/38

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Pedido de patente depositado

#2.1

07/11/1989

RPI 977

Carta-patente expirada

#21.1

Patente extinta em 05/06/2004

12/22/2009

RPI 2033

Concessão da patente

#16.1

06/27/1995

RPI 1282

Notificação para pagamento de retribuição

#13.1

01/17/1995

RPI 1259

Deferimento

#9.1

09/13/1994

RPI 1241

Solicitação de exame técnico

#4.1

07/30/1991

RPI 1078

Publicação do pedido de patente

#3.1

12/18/1990

RPI 1046

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CONVERSOR DE REDE INDUTOR DE INDUTÂNCIA CONTROLÁVEL

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