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Official data from INPI

INDUTOR ELETROMAGNÉTICO DESTINADO A PRODUZIR UM CAMPO HELICOIDAL.

ConcedidaInvention Patent
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Application data

Number

PI8000516

Type

Invention Patent

Filing

01/28/1980

Publication

-
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Progress at the INPI

  1. Filing01/28/80
  2. Publication
  3. Examination
  4. Allowance08/09/83
  5. Grant02/28/84
  6. Expired05/16/95

The letters patent expired on 05/16/1995: 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: 02/28/1984. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

CEM - Compagnie Electro-Mécanique

Inventors

D. J. (pessoa física)

Technical data

IPC Classification

H01F 27/34

Priority claims

FR

79 02274 · 01/30/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

02/28/1984

RPI 697

Notificação para pagamento de retribuição

#13.1

11/29/1983

RPI 684

Deferimento

#9.1

08/09/1983

RPI 668

Exigência - art. 36 da LPI

#6.1

04/05/1983

RPI 650

Carta-patente expirada

#21.1

05/16/1995

RPI 1276

Pedido de licença compulsória

#20.1

08/16/1994

RPI 1237

Pedido de licença compulsória

#20.1

08/02/1994

RPI 1235

Pedido de licença compulsória

#20.1

07/19/1994

RPI 1233

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