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US2440146A
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Defrosting mechanism in refrigerating apparatus
Assignee: Kramer Trenton Co
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Filing: 1944-11-07
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Granted: 1948-04-20
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Expires: 1964-11-07
Abstract
No abstract record available.
Inventors
- 👤 Kramer Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:55
CPC Classifications
F; F25; F25B; F25B40/00; F25B31/00; F25B31/002; F25B31/004; F25B43/00; F25B43/006; F25B47/00; F25B47/02; F25B47/022
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-20 | 1951-10-20 | 1952-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-20 | 1955-10-20 | 1956-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-20 | 1959-10-20 | 1960-04-20 | $7700.00 | Window Closed / Lapsed |