US2673323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulating apparatus for alternating electric current circuits
Assignee: Siemens Mobility Ltd
•
Filing: 1948-12-23
•
Granted: 1954-03-23
•
Expires: 1968-12-23
Abstract
No abstract record available.
Inventors
- 👤 Walker Alec Hervey Bennett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:47
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/32
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1942535A
Cited
US2085061A
Cited
GB479596A
Cited
US2278151A
Cited
US2413263A
Cited
US2441967A
Cited
US2437837A
Cited
GB612442A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |