US3224727A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetically actuated control for thermosyphoning refrigerator system
Assignee: Individual
•
Filing: 1962-10-19
•
Granted: 1965-12-21
•
Expires: 1982-10-19
Abstract
No abstract record available.
Inventors
- 👤 Charles O Dale
- 👤 Cantabene Anthony
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:32
CPC Classifications
F; F25; F25B; F25B49/00; F25B49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2281605A
Cited
US2307723A
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US2341041A
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US2533491A
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US2575086A
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US2781979A
Cited
US2842150A
Cited
US2942837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-12-20 | 1969-06-21 | 1969-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-20 | 1973-06-21 | 1973-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-20 | 1977-06-21 | 1977-12-21 | $7700.00 | Window Closed / Lapsed |