Patent US3340458A successfully refreshed from Google Patents.
US3340458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter choke with self-desaturating magnetic core
Assignee: Individual
•
Filing: 1964-06-16
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Granted: 1967-09-05
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Expires: 1984-06-16
Abstract
No abstract record available.
Inventors
- 👤 Roy M Keller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:45
CPC Classifications
H; H02; H02M; H02M1/00; H02M1/14; H04; H04B; H04B15/00; H04B15/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A FILTER CAKE OF THE CHARACTER REFERRED TO INCLUDING A FIRST INDUCTION COIL WOUND ABOUT A MAGNETIC CORE WITH A SET AIR GAP, A SECOND INDUCTION COIL ABOUT THE MAGNETIC CORE AND WOUND IN INVERTED PHASE RELATIONSHIP TO THE FIRST COIL, SAID COILS HAVING ENDS CONNECTED WITH A SOURCE OF PULSATING DIRECT CURRENT, AND CREATE EQUAL AND OPPOSING MAGNETIC FIELDS IN AND THROUGH THE MAGNETIC CORE PREVENTING MAGNETIC SATURATION OF THE CORE, SO THE FULL PERMEABILITY OF THE CORE MATERIAL IS AVAILABLE FOR AMPLIFICATION OF ALTERNATING CURRENT FLUX DENSITIES.
Claim 2
Dependent Claim
89 words
A FILTER CAKE OF THE CHARACTER REFERRED TO INCLUDING A FIRST INDUCTION COIL WOUND ABOUT A MAGNETIC CORE WITH A SET AIR GAP, A SECOND INDUCTION COIL ABOUT THE MAGNETIC CORE AND WOUND IN INVERTED PHASE RELATIONSHIP TO THE FIRST COIL, SAID COILS HAVING ENDS CONNECTED WITH A SOURCE OF PULSATING DIRECT CURRENT, AND CREATE EQUAL AND OPPOSING MAGNETIC FIELDS IN AND THROUGH THE MAGNETIC CORE PREVENTING MAGNETIC SATURATION OF THE CORE, SO THE FULL PERMEABILITY OF THE CORE MATERIAL IS AVAILABLE FOR AMPLIFICATION OF ALTERNATING CURRENT FLUX DENSITIES.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-04 | 1971-03-06 | 1971-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-04 | 1975-03-06 | 1975-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-04 | 1979-03-06 | 1979-09-05 | $7700.00 | Window Closed / Lapsed |