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US2489906A
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Refrigerator control and alarm system
Assignee: Cutler Hammer Inc
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Filing: 1945-10-15
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Granted: 1949-11-29
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Expires: 1965-10-15
Abstract
No abstract record available.
Inventors
- 👤 Clarence W Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:07
CPC Classifications
F; F25; F25D; F25D29/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US934754A
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US2115027A
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US2092085A
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US2238071A
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US2408667A
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US2447893A
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US2447895A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |