US2478889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for cooling hot hygroscopic solids
Assignee: EMULSOL Corp
•
Filing: 1942-10-29
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Granted: 1949-08-16
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Expires: 1962-10-29
Abstract
No abstract record available.
Inventors
- 👤 Benjamin R Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:45
CPC Classifications
A; A23; A23B; A23B5/00; A23B5/04; A23B5/041; A23B5/02; A23B5/035
Claims Analysis
Total Claims: 0
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US2268905A
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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) | 1952-08-15 | 1953-02-14 | 1953-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-08-15 | 1957-02-14 | 1957-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-08-15 | 1961-02-14 | 1961-08-16 | $7700.00 | Window Closed / Lapsed |