US2628479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Defrosting system
Assignee: Individual
•
Filing: 1950-10-02
•
Granted: 1953-02-17
•
Expires: 1970-10-02
Abstract
No abstract record available.
Inventors
- 👤 Felix W Powers
- 👤 Lundin Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:20
CPC Classifications
F; F25; F25B; F25B47/00; F25B47/02; F25B47/022; Y; Y10; Y10S; Y10S62/00; Y10S62/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1819510A
Cited
US1970340A
Cited
US2167036A
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US2313390A
Cited
US2452102A
Cited
US2459173A
Cited
US2551163A
Cited
US2451385A
Cited
US2554848A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |