US2747382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for concentrating anti-freeze solution
Assignee: Copeland Industrial LP
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Filing: 1952-12-17
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Granted: 1956-05-29
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Expires: 1972-12-17
Abstract
No abstract record available.
Inventors
- 👤 Sloan Harry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:39
CPC Classifications
F; F25; F25D; F25D21/00; F25D21/06; F25D21/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
IN A DEFROSTING SYSTEM FOR AIR STEAM REFRIGERATED COOLING SURFACES, MEANS FOR CONSTANTLY CIRCULATING ABUNDANT QUANTITIES OF HYGROSCOPIC SOLUTION HAVING LOW FREEZING POINT OVER THE AIR COOLING SURFACES TO PREVENT FROST DEPOSITS THEREON BY CAUSING THE SOLUTION TO ABSORB FROST PRODUCING MOISTURE FROM THE AIR STREAM, MEANS FOR WITHDRAWING REGULATED QUANTITIES OF THE FROST PREVENTING SOLUTION MIXED WITH ABSORBED MOISTURE FROM THE SOLUTION CIRCULATING MEANS AND FOR DISTILLING THE WITHDRAWN MIX TURE UNDER VACUUM TO CONCENTRATED THE SOLUTION THEREOF, MEANS FOR RETURNING THE CONCENTRATED DISTILLED SOLUTION TO SAID CIRCULATING MEANS, AND MEANS FOR RETURNING REMOVED MOISTURE RESULTING FROM SAID DISTILLATION TO THE AIR STEAM BEYOND SAID COOLING SURFACES TO HUMIDIFY THE COOLED AIR.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-29 | 1959-11-28 | 1960-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-29 | 1963-11-28 | 1964-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-29 | 1967-11-28 | 1968-05-29 | $7700.00 | Window Closed / Lapsed |