US2443300A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: Electric Machinery Manufacturing Co
•
Filing: 1945-04-30
•
Granted: 1948-06-15
•
Expires: 1965-04-30
Abstract
No abstract record available.
Inventors
- 👤 William R Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 00:12
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2021754A
Cited
US2134880A
Cited
US2085596A
Cited
US2158871A
Cited
US2217457A
Cited
US2344608A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-06-15 | 1951-12-15 | 1952-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-06-15 | 1955-12-15 | 1956-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-06-15 | 1959-12-15 | 1960-06-15 | $7700.00 | Window Closed / Lapsed |