Patent US2830253A successfully refreshed from Google Patents.
US2830253A
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US
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Automatic line voltage adjuster
Assignee: WESTRONIC Corp
•
Filing: 1953-10-30
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Granted: 1958-04-08
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Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jr George E Sleeper
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:07
CPC Classifications
G; G05; G05F; G05F1/00; G05F1/10; G05F1/12; G05F1/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1477668A
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US1928858A
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US1927199A
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US2021034A
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US2096865A
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US2274992A
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US2296031A
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US2389458A
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US2524325A
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US2570448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-07 | 1961-10-07 | 1962-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-07 | 1965-10-07 | 1966-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-07 | 1969-10-07 | 1970-04-08 | $7700.00 | Window Closed / Lapsed |