US2548324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrost control for refrigeration systems
Assignee: Missouri Automatic Control Corp
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Filing: 1950-01-19
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Granted: 1951-04-10
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Expires: 1970-01-19
Abstract
No abstract record available.
Inventors
- 👤 Carl A Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:40
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/002; F25D21/008; F25B; F25B47/00; F25B47/02; F25B47/022; F25B2700/00; F25B2700/21; F25B2700/2117; Y; Y10; Y10T; Y10T137/00; Y10T137/6416; Y10T137/6525; Y10T137/8593; Y10T137/86389; Y10T137/86405; Y10T137/86421; Y10T137/86437
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2396809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |