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Official data from INPI

REGULADOR DE TENSÃO DE CORRENTE CONTÍNUA PARA CORRENTE CONTÍNUA E PARA CORRENTE ALTERNADA.

ConcedidaInvention Patent
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Application data

Number

PI8301738

Type

Invention Patent

Filing

04/06/1983

Publication

11/13/1984
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Progress at the INPI

  1. Filing04/06/83
  2. Publication11/13/84
  3. Examination09/30/86
  4. Allowance09/08/87
  5. Grant05/31/88
  6. Expired07/01/08

The letters patent expired on 07/01/2008: 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: 05/31/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

AMERICAN STANDARD INC.

Union Switch & Signal, Inc.

US

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Inventors

B. R. (pessoa física)

Technical data

IPC Classification

H02H 3/22

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1988

RPI 919

Notificação para pagamento de retribuição

#13.1

01/26/1988

RPI 901

Deferimento

#9.1

09/08/1987

RPI 881

Republicação - classificação IPC

#15.11

06/09/1987

RPI 868

Solicitação de exame técnico

#4.1

09/30/1986

RPI 832

Republicação - classificação IPC

#15.11

05/28/1985

RPI 762

Publicação do pedido de patente

#3.1

11/13/1984

RPI 734

Pedido de patente depositado

#2.1

05/24/1983

RPI 657

Carta-patente expirada

#21.1

Patente extinta em 06/04/98

07/01/2008

RPI 1956

Pedido de licença compulsória

#20.1

05/08/1990

RPI 1017

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