US3099138A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous cooling method and apparatus
Assignee: Individual
•
Filing: 1961-04-28
•
Granted: 1963-07-30
•
Expires: 1981-04-28
Abstract
No abstract record available.
Inventors
- 👤 John R Hightower
- 👤 James T Reynolds
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:15
CPC Classifications
B; B28; B28C; B28C7/00; B28C7/0007; B28C7/0023; B28C7/0038; F; F25; F25D; F25D31/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
75 words
APPARATUS FOR COOLING SAND, WHICH COMPRISES A VERTICAL CYLINDRICAL SHELL, AT LEAST ONE INVERTED CONICAL DIVIDER WITHIN SAID SHELL TO FORM A SUPERIMPOSED STORAGE COMPARTMENT AND AT LEAST ONE LOWER VACUUM CHAMBER, A CIRCULAR OPENING IN SAID DIVIDER, VIBRATING MEANS ON SAID DIVIDER, THROTTLING VALVE MEANS TO CONSTRICT SAID DIVIDER OPENING, VIBRATING MEANS ON SAID VALVE MEANS, MEANS TO RAISE AND LOWER SAID THROTTLING VALVE MEANS, MEANS TO CHARGE SAND INTO SEAL SAID STORAGE COMPARTMENT,
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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) | 1966-07-29 | 1967-01-28 | 1967-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-29 | 1971-01-28 | 1971-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-29 | 1975-01-28 | 1975-07-30 | $7700.00 | Window Closed / Lapsed |