US2525698A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Compensated voltage regulator
Assignee: Hazeltine Research Inc
•
Filing: 1947-04-30
•
Granted: 1950-10-10
•
Expires: 1967-04-30
Abstract
No abstract record available.
Inventors
- 👤 Ronald B Mackenzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:46
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/607; H; H03; H03F; H03F3/00; H03F3/34; H03F3/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2246331A
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US2271197A
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US2276563A
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US2261335A
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US2274365A
Cited
US2329073A
Cited
US2394891A
Cited
US2484724A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-09 | 1954-04-10 | 1954-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-09 | 1958-04-10 | 1958-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-09 | 1962-04-10 | 1962-10-10 | $7700.00 | Window Closed / Lapsed |