US2742342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for vaporization of sublimate solids
Assignee: Individual
•
Filing: 1952-06-10
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Granted: 1956-04-17
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Expires: 1972-06-10
Abstract
No abstract record available.
Inventors
- 👤 John N Dew
- 👤 Cedomir M Sliepcevich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:27
CPC Classifications
A; A01; A01M; A01M1/00; A01M1/20; A01M1/2022; A01M1/2061; A01M1/2083
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
97 words
A METHOD FOR SUBLIMING LINDANE WHICH COMPRISES HEATING AIR WITHIN A CONFINED PASSGEWAY TO A TEMPERATURE BETWEEN 50 AND 65* C. SUCH THAT A CURRENT OF HEATED AIR IS INDUCED, SUPPORTING A PERVIOUS LAYER OF LINDANE WITHIN SAID CONFINED PASSAGEWAY AT A SUBSTANTIAL DISTANCE ABOVE THE ZONE OF HEATING SUCH THAT SAID INDUCED CURRENT OF HEATED AIR PERCOLATE THROUGH SAID PERVIOUS LAYER OF LINDANE AT A TEMPERATURE BELOW ITS MELTING POINT AND MAINTAINING SAID SOLIDS BETWEEN 50 AND 60* C. THEREBY SUBLIMING THE LINDANE WITHOUT MELTING THE SOLIDS AT A RATE LIMITED BY THE INDUCED AIR CIRCULTION.
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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) | 1959-04-17 | 1959-10-17 | 1960-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-04-17 | 1963-10-17 | 1964-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-04-17 | 1967-10-17 | 1968-04-17 | $7700.00 | Window Closed / Lapsed |