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Official data from INPI

SISTEMA DE CONTROLE DE MOTOR DE INDUCAO

ConcedidaInvention Patent
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Application data

Number

PI7800620

Type

Invention Patent

Filing

02/01/1977

Publication

-
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Progress at the INPI

  1. Filing02/01/77
  2. Publication
  3. Examination
  4. Allowance08/23/88
  5. Grant04/25/89
  6. Expired09/21/93

The letters patent expired on 09/21/1993: 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: 04/25/1989. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

MITSUBISHI ELECTRIC CORP

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Inventors

A. M. (pessoa física)

Technical data

IPC Classification

H02P 8/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

04/25/1989

RPI 966

Notificação para pagamento de retribuição

#13.1

12/13/1988

RPI 947

Deferimento

#9.1

08/23/1988

RPI 931

Republicação - classificação IPC

#15.11

05/10/1988

RPI 916

Exigência - art. 36 da LPI

#6.1

01/12/1988

RPI 899

Carta-patente expirada

#21.1

09/21/1993

RPI 1190

Republicação - classificação IPC

#15.11

10/01/1991

RPI 1087

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