US3295056A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined unit of impedance
Assignee: TDK Corp
•
Filing: 1962-04-17
•
Granted: 1966-12-27
•
Expires: 1982-04-17
Abstract
No abstract record available.
Inventors
- 👤 Matsushima Mitsuo
- 👤 Ogawa Shigeaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:10
CPC Classifications
H; H01; H01G; H01G2/00; H01F; H01F27/00; H01F27/40; H03; H03H; H03H5/00; H03H5/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A COMPACT IMPEDANCE DEVICE COMPRISING, IN COMBINATION A GENERALLY CYLINDRICAL ONE-PIECE FERRITE CORE HAVING A CIRCUMFERENTIALLY EXTENDING RADIAL RECESS INTERMEDIATE A PAIR OF ENLARGED ENDS; LAYERS OF RELATIVELY LOW RISISTANCE ELECTRICALLY CONDUCTIE METAL EACH DISPOSED ON A RESPECTIVE END OF SAID CORE, A PAIR OF TERMINALS EACH ELECTRICALLY CONNECTED TO A RESPECTIVE ONE OF SAID LAYERS, A COIL WINDING DISPOPSED IN SAID RECESS HAVING ITS ENDS RESPECTIVELY CONNECTED TO SAID PAIR OF TERMINALS, SAID COIL WINDING CONSTITUTING A FIRST IMPEDANCE COMPONENT, A CONDUCTOR OF HIGH RESISTANCE MATERIAL INCLUDING AT LEAST ONE OF SAID LAYERS CONSTITUTING A SECOND IMPEDANCE COMPONENT, AND CONDUCTIVE LEADS RESPECTIVELY CONNECTED TO SAID PAIR OF TERMINALS.
Claim 2
Dependent Claim
109 words
A COMPACT IMPEDANCE DEVICE COMPRISING, IN COMBINATION A GENERALLY CYLINDRICAL ONE-PIECE FERRITE CORE HAVING A CIRCUMFERENTIALLY EXTENDING RADIAL RECESS INTERMEDIATE A PAIR OF ENLARGED ENDS; LAYERS OF RELATIVELY LOW RISISTANCE ELECTRICALLY CONDUCTIE METAL EACH DISPOSED ON A RESPECTIVE END OF SAID CORE, A PAIR OF TERMINALS EACH ELECTRICALLY CONNECTED TO A RESPECTIVE ONE OF SAID LAYERS, A COIL WINDING DISPOPSED IN SAID RECESS HAVING ITS ENDS RESPECTIVELY CONNECTED TO SAID PAIR OF TERMINALS, SAID COIL WINDING CONSTITUTING A FIRST IMPEDANCE COMPONENT, A CONDUCTOR OF HIGH RESISTANCE MATERIAL INCLUDING AT LEAST ONE OF SAID LAYERS CONSTITUTING A SECOND IMPEDANCE COMPONENT, AND CONDUCTIVE LEADS RESPECTIVELY CONNECTED TO SAID PAIR OF TERMINALS.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-26 | 1970-06-27 | 1970-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-26 | 1974-06-27 | 1974-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-26 | 1978-06-27 | 1978-12-27 | $7700.00 | Window Closed / Lapsed |