US3440514A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Static inverter
Assignee: THOMAS D FENLEY
•
Filing: 1966-05-03
•
Granted: 1969-04-22
•
Expires: 1986-05-03
Abstract
No abstract record available.
Inventors
- 👤 Thomas D Fenley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:46
CPC Classifications
H; H02; H02M; H02M7/00; H02M7/42; H02M7/44; H02M7/48; H02M7/483
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1362794A
Cited
GB834022A
Cited
US2920217A
Cited
US3100851A
Cited
US3293445A
Cited
US3237078A
Cited
US3305754A
Cited
US3339080A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |