US3131338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary solid dielectric variable condenser
Assignee: Individual
•
Filing: 1960-04-08
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Granted: 1964-04-28
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Expires: 1980-04-08
Abstract
No abstract record available.
Inventors
- 👤 James E Howell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 19:42
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/14
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
77 words
A SOLID DIELECTRIC VARIABLE CONDENSER COMPRISING A PAIR OF RELATIVELY ROTATABLE CAPACITOR PLATES DISPOSED FOR ELECTRICAL CONNECTION TO CORRESPONDING CONDUCTORS, A DIELECTRIC MEMBER OF VARYING THICKNESS DISPOSED BETWEEN SAID PLATES, AN INSULATING MEMBER ADJACENT SAID FIRST PLATES AND MOUNTED FOR ROTATION THEREWITH, EACH OF SAID PLATES PROVIDED WITH AREAS IN APPOSITION MOVABLE IN AND OUT OF REGISTRY ACROSS SAID DIELECTRIC AND SAID INSULATING MEMBER RESPONSIVE TO THE RELATIVE ROTATION OF SAID PLATES FOR CONTROL OF THE CAPACITANCE.
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |