US3102719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preheating pulverulent materials
Assignee: Prerovske Strojirny np
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Filing: 1961-05-31
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Granted: 1963-09-03
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Expires: 1981-05-31
Abstract
No abstract record available.
Inventors
- 👤 Zacpal Zdenek
- 👤 Safar Jiri
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:43
CPC Classifications
F; F27; F27B; F27B7/00; F27B7/20; F27B7/2016; F27B7/2025; F26; F26B; F26B17/00; F26B17/10; F26B17/107
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF PREHEATING A PULVERULENT MATERIAL WHICH COMPRISES (A) FEEDING SAID MATERIAL TO THE TOP OF A SHAFT HAVING A VERTICALLY EXTENDING AXIS FOR DOWNWARD MOVEMENT IN SAID SHAFT; (B) FEEDING A HOT GAS TO THE BOTTOM OF SAID SHAFT IN A TANGENTIAL PATH FOR SPIRALING UPWARD MOVEMENT COUNTERCURRENT TO SAID MATERIAL, WHEREBY SAID MATERIAL IS HEATED; (C) WITHDRAWING SAID GAS FROM THE TOP OF SAID SHAFT IN A TANGENTIAL DIRECTION; (D) SEPARATING ENTRAINED PARTICLES OF SAID MATERIAL FROM THE WITHDRAWN GAS; (E) RETURNING THE SEPARATED PARTICLES TO THE TOP OF SAID SHAFT; AND (F) WITHDRAWING THE HEATED MATERIAL FROM THE BOTTOM OF SAID SHAFT.
Claim 2
Independent Claim
106 words
A METHOD OF PREHEATING A PULVERULENT MATERIAL WHICH COMPRISES (A) FEEDING SAID MATERIAL TO THE TOP OF A SHAFT HAVING A VERTICALLY EXTENDING AXIS FOR DOWNWARD MOVEMENT IN SAID SHAFT; (B) FEEDING A HOT GAS TO THE BOTTOM OF SAID SHAFT IN A TANGENTIAL PATH FOR SPIRALING UPWARD MOVEMENT COUNTERCURRENT TO SAID MATERIAL, WHEREBY SAID MATERIAL IS HEATED; (C) WITHDRAWING SAID GAS FROM THE TOP OF SAID SHAFT IN A TANGENTIAL DIRECTION; (D) SEPARATING ENTRAINED PARTICLES OF SAID MATERIAL FROM THE WITHDRAWN GAS; (E) RETURNING THE SEPARATED PARTICLES TO THE TOP OF SAID SHAFT; AND (F) WITHDRAWING THE HEATED MATERIAL FROM THE BOTTOM OF SAID SHAFT.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-09-02 | 1967-03-04 | 1967-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-09-02 | 1971-03-04 | 1971-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-09-02 | 1975-03-04 | 1975-09-03 | $7700.00 | Window Closed / Lapsed |