Patent US2680832A successfully refreshed from Google Patents.
US2680832A
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Voltage regulating means
Assignee: McGraw Electric Co
•
Filing: 1949-08-08
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Granted: 1954-06-08
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Expires: 1969-08-08
Abstract
No abstract record available.
Inventors
- 👤 Blaine H Schultz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:31
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/14; G05F1/147
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1250806A
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US1516313A
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US1743096A
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US2079492A
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US2022537A
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US2200128A
Cited
US2296031A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-07 | 1957-12-07 | 1958-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-07 | 1961-12-07 | 1962-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-07 | 1965-12-07 | 1966-06-08 | $7700.00 | Window Closed / Lapsed |