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Official data from INPI

Analisador de resistência de isolamento de voltagem constante.

Em AnáliseInvention Patent

Application data

Number

PI7906260

Type

Invention Patent

Filing

09/28/1979

Publication

-

Progress at the INPI

  1. Filing09/28/79
  2. Publication
  3. Examination
  4. Allowance06/01/82
  5. Grant02/22/83
  6. Expired04/25/95

The letters patent expired on 04/25/1995: the term of protection has ended. The technology is in the public domain and may be freely used in Brazil.

Talk to a specialist

Latest action published by the INPI: 02/09/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

Yokogawa Eletric Works, Ltd.

Inventors

M. N. (pessoa física)

Technical data

IPC Classification

Priority claims

JP

79-137331 · 02/08/1979

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

02/09/1988

RPI 903

20.4

11/01/1983

RPI 680

Concessão da patente

#16.1

02/22/1983

RPI 644

Notificação para pagamento de retribuição

#13.1

09/21/1982

RPI 622

Deferimento

#9.1

06/01/1982

RPI 606

Carta-patente expirada

#21.1

04/25/1995

RPI 1273

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