US2906459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Quarter square electric voltage multiplier
Assignee: AT&T Inc
•
Filing: 1953-04-13
•
Granted: 1959-09-29
•
Expires: 1973-04-13
Abstract
No abstract record available.
Inventors
- 👤 Clarence A Lovell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:54
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/164
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2059594A
Cited
US2196996A
Cited
US2408081A
Cited
US2401447A
Cited
US2428541A
Cited
US2441387A
Cited
US2454549A
Cited
US2587193A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |