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Official data from INPI

PROCESSO E APARELHO PARA COMUTAÇÃO DE CIRCUITOS EM PONTE A TIRISTOR NA CONVERSÃO ESTÁTICA DE CORRENTE ALTERNADA EM CORRENTE CONTÍNUA.

ConcedidaInvention Patent

Application data

Number

PI8008539

Type

Invention Patent

Filing

12/29/1980

Publication

-

Progress at the INPI

  1. Filing12/29/80
  2. Publication
  3. Examination03/09/82
  4. Allowance09/28/82
  5. Grant05/31/83
  6. Expired03/19/96

The letters patent expired on 03/19/1996: 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: 05/31/1983. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Elevator Gmbh.

CH

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Inventors

K. M. (pessoa física)

Technical data

IPC Classification

Priority claims

FI

7904075 · 12/28/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

05/31/1983

RPI 658

Notificação para pagamento de retribuição

#13.1

02/01/1983

RPI 641

Deferimento

#9.1

09/28/1982

RPI 623

Solicitação de exame técnico

#4.1

03/09/1982

RPI 594

Carta-patente expirada

#21.1

03/19/1996

RPI 1320

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