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Official data from INPI

ISOLADOR DE SINAL DIMINUTO

Em AnáliseInvention Patent
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Application data

Number

PI7805595

Type

Invention Patent

Filing

09/07/1977

Publication

-
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Progress at the INPI

  1. Filing09/07/77
  2. Publication
  3. Examination
  4. Allowance
  5. Grant07/27/82
  6. 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: 01/19/1988. We update with every new RPI gazette, published weekly.

Applicants and inventors

Applicants

YOKOGAWA ELECTRIC WORKS LTD

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Inventors

S. S. (pessoa física)

Y. K. (pessoa física)

Technical data

IPC Classification

H03H 11/00H03H 7/00

Prosecution history

Publications in the Brazilian Industrial Property Gazette (RPI).

20.4

01/19/1988

RPI 900

20.4

11/01/1983

RPI 680

Concessão da patente

#16.1

07/27/1982

RPI 614

Notificação para pagamento de retribuição

#13.1

01/26/1982

RPI 588

Carta-patente expirada

#21.1

05/03/1994

RPI 1222

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