US2511219A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: DONALD R MIDDLETON
•
Filing: 1948-04-17
•
Granted: 1950-06-13
•
Expires: 1968-04-17
Abstract
No abstract record available.
Inventors
- 👤 Roman J Pogorzelski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:14
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32; G05F1/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2019352A
Cited
US2079500A
Cited
US2210732A
Cited
US2210394A
Cited
US2414242A
Cited
US2413941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-06-12 | 1953-12-12 | 1954-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-06-12 | 1957-12-12 | 1958-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-06-12 | 1961-12-12 | 1962-06-13 | $7700.00 | Window Closed / Lapsed |