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US3110751A
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Process for the reduction of the alkali content in cement clinker
Assignee: Allis Chalmers Corp
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Filing: 1961-08-15
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Granted: 1963-11-12
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Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 Bade Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:59
CPC Classifications
C; C05; C05D; C05D9/00; C04; C04B; C04B7/00; C04B7/36; C04B7/60
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
82 words
A METHOD FOR REDUCING THE ALKALI KCONTENT OF CEMENT CLINKER AND PRODUCING AS A BYPRODUCT ALKALINE DUST THAT MAY BE USED AS A FERTILIZER, COMPRISING THE STEPS OF: FIRST, FEEDING CEMENT RAW MATERIAL THROUGH DRYING, PREBURNING, AND FINAL BURNING ZONES SUCCESSIVELY; SECOND, DIRECTING A FLOW OF HOT DUST LADEN GASES FROM THE FINAL BURNING ZONE AT A TEMPERATURE OF ABOUT 1800*F. THROUGH AN AMOUNT OF THE MATERIAL IN THE PREBURNING ZONE SUFFICIENT TO LOWER THE TEMPERATURE OF THE GASES TO ABOUT 500*F.;
Claim 2
Independent Claim
82 words
A METHOD FOR REDUCING THE ALKALI KCONTENT OF CEMENT CLINKER AND PRODUCING AS A BYPRODUCT ALKALINE DUST THAT MAY BE USED AS A FERTILIZER, COMPRISING THE STEPS OF: FIRST, FEEDING CEMENT RAW MATERIAL THROUGH DRYING, PREBURNING, AND FINAL BURNING ZONES SUCCESSIVELY; SECOND, DIRECTING A FLOW OF HOT DUST LADEN GASES FROM THE FINAL BURNING ZONE AT A TEMPERATURE OF ABOUT 1800*F. THROUGH AN AMOUNT OF THE MATERIAL IN THE PREBURNING ZONE SUFFICIENT TO LOWER THE TEMPERATURE OF THE GASES TO ABOUT 500*F.;
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) | 1966-11-11 | 1967-05-13 | 1967-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-11 | 1971-05-13 | 1971-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-11 | 1975-05-13 | 1975-11-12 | $7700.00 | Window Closed / Lapsed |