Official data from INPI

DISPOSITIVO DE TRANSMISSAO DE ENERGIA POR CORRENTE CONTINUA

ConcedidaInvention Patent

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Application data

Number

PI7805338

Type

Invention Patent

Filing

08/19/1977

Publication

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Progress at the INPI

Filing08/19/77
Publication
Examination
Allowance01/05/82
Grant08/31/82
Expired05/03/94

The letters patent expired on 05/03/1994: 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: 08/31/1982. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

ASEA AB

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Inventors

L. C. (pessoa física)

Technical data

IPC Classification

H02J 3/36

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

Concessão da patente

#16.1

08/31/1982

RPI 619

Notificação para pagamento de retribuição

#13.1

05/04/1982

RPI 602

Deferimento

#9.1

01/05/1982

RPI 585

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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