US3101935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and kiln for burning cement, lime, dolomite and the like
Assignee: L VON ROLL AG
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Filing: 1960-11-28
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Granted: 1963-08-27
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Expires: 1980-11-28
Abstract
No abstract record available.
Inventors
- 👤 Zeltner Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:33
CPC Classifications
F; F27; F27B; F27B1/00; F27B1/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
212 words
A METHOD OF HEAT TREATING A CHARGE SUCH AS CEMENT, LIME, DOLOMITE AND THE LIKE, COMPRISING THE STEPS OF MIXING A QUANTITY OF AIR WITH A FUEL AND BURNING THE SAME TO COMPLETE COMBUSTION TO PRODUCE HOT GASES, DIRECTING SAID HOT GASES WITH SUBSTANTIALLY SYMMETRICAL INFEED INTO CONTACT WITH A CHARGE TO BE HEAT TREATED IN A HEATING SECTION OF A KILN, DISTRIBUTING SAID HOT GASES INTO SUBSTANTIALLY AT LEAST TWO HOT GAS STREAMS, EACH OF WHICH IS OPERABLE THROUGHOUT APPROXIMATELY ONE-HALF OF THE CROSS-SECTION OF SAID KILN TO THUS UNIFORMLY PENETRATE AND HEAT TREAT THE CHARGE LOCATED THEREIN, BYPASSING A FIRST PORTION OF SAID HOT GASES INTO A DUCT WHICH DOES NOT CONTAIN SAID CHARGE WHILE THE REMAINING MAJOR PORTION OF SAID HOT GASES FREELY CIRCULATES THROUGH SAID CHARGE FOR HEAT TREATING THEREOF, FEEDING A SUPPLY OF COOLING AIR THROUGH A COOLING SECTION OF SAID KILN TO CONTACT SAID CHARGE FFOR HEAT TRANSFER THEREWITH AND TOWARD SAID HOT GASES CIRCULATING THROUGH SAID CHARGE, THEN BYPASSING SAID COOLING AIR INTO SAID DUCT WHICH DOES NOT CONTAIN SAID CHARGE ADJACENT THE UPPER REGION OF SAID COOLING SECTION AT LEAST PRIOR TO INTIMATE CONTACT OF SAID COOLING AIR WITH SAID HOT GASES TO PREVENT HEAT TRANSFER BETWEEN SAID COOLING AIR AND SAID HOT GASES
Claim 2
Independent Claim
212 words
A METHOD OF HEAT TREATING A CHARGE SUCH AS CEMENT, LIME, DOLOMITE AND THE LIKE, COMPRISING THE STEPS OF MIXING A QUANTITY OF AIR WITH A FUEL AND BURNING THE SAME TO COMPLETE COMBUSTION TO PRODUCE HOT GASES, DIRECTING SAID HOT GASES WITH SUBSTANTIALLY SYMMETRICAL INFEED INTO CONTACT WITH A CHARGE TO BE HEAT TREATED IN A HEATING SECTION OF A KILN, DISTRIBUTING SAID HOT GASES INTO SUBSTANTIALLY AT LEAST TWO HOT GAS STREAMS, EACH OF WHICH IS OPERABLE THROUGHOUT APPROXIMATELY ONE-HALF OF THE CROSS-SECTION OF SAID KILN TO THUS UNIFORMLY PENETRATE AND HEAT TREAT THE CHARGE LOCATED THEREIN, BYPASSING A FIRST PORTION OF SAID HOT GASES INTO A DUCT WHICH DOES NOT CONTAIN SAID CHARGE WHILE THE REMAINING MAJOR PORTION OF SAID HOT GASES FREELY CIRCULATES THROUGH SAID CHARGE FOR HEAT TREATING THEREOF, FEEDING A SUPPLY OF COOLING AIR THROUGH A COOLING SECTION OF SAID KILN TO CONTACT SAID CHARGE FFOR HEAT TRANSFER THEREWITH AND TOWARD SAID HOT GASES CIRCULATING THROUGH SAID CHARGE, THEN BYPASSING SAID COOLING AIR INTO SAID DUCT WHICH DOES NOT CONTAIN SAID CHARGE ADJACENT THE UPPER REGION OF SAID COOLING SECTION AT LEAST PRIOR TO INTIMATE CONTACT OF SAID COOLING AIR WITH SAID HOT GASES TO PREVENT HEAT TRANSFER BETWEEN SAID COOLING AIR AND SAID HOT GASES
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) | 1966-08-26 | 1967-02-25 | 1967-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-26 | 1971-02-25 | 1971-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-26 | 1975-02-25 | 1975-08-27 | $7700.00 | Window Closed / Lapsed |