US2698405A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wide-range, high-voltage, variable capacitor
Assignee: Individual
•
Filing: 1951-10-31
•
Granted: 1954-12-28
•
Expires: 1971-10-31
Abstract
No abstract record available.
Inventors
- 👤 True Virgil
- 👤 Fisk Bert
- 👤 Charles L Spencer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:34
CPC Classifications
H; H01; H01G; H01G5/00; H01G5/04; H01G5/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE23368E
Cited
US1258423A
Cited
US1641945A
Cited
US1604508A
Cited
US1743870A
Cited
GB425329A
Cited
GB464254A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-12-27 | 1958-06-28 | 1958-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-12-27 | 1962-06-28 | 1962-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-12-27 | 1966-06-28 | 1966-12-28 | $7700.00 | Window Closed / Lapsed |