US2668272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage regulator
Assignee: Individual
•
Filing: 1946-03-01
•
Granted: 1954-02-02
•
Expires: 1966-03-01
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward J Groth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:26
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/46; G05F1/52
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1796375A
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US2075966A
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US2138891A
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US2085488A
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US2312934A
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US2210393A
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US2226233A
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US2329073A
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US2424893A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-01 | 1957-08-03 | 1958-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-01 | 1961-08-03 | 1962-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-01 | 1965-08-03 | 1966-02-02 | $7700.00 | Window Closed / Lapsed |