Patent US3017246A successfully refreshed from Google Patents.
US3017246A
Expired / Lapsed
US
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Process for the joint manufacture of hydrofluoric acid and portland cement clinker
Assignee: Individual
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Filing: 1960-04-21
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Granted: 1962-01-16
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Expires: 1980-04-21
Abstract
No abstract record available.
Inventors
- 👤 Kamlet Edna Yadven
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:44
CPC Classifications
C; C01; C01B; C01B7/00; C01B7/19; C01B7/191; C01B7/192; C04; C04B; C04B7/00; C04B7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
A PROCESS FOR THE JOINT MANUFACTURE OF HYDROFLUORIC ACID AND PORTLAND CEMENT CLINKER WHICH COMPRISES THE STEPS OF: (A) FEEDING A MIXTURE OF A CALCIUM FLUORIDE-CONTAINING MATERIAL, A SOURCE OF ALUMINA, A SOURCE OF SILICA AND A SOURCE OF IRON OXIDE TO A ROTARY KILN, SAID MIXTURE CONTAINING FROM 40.8 TO 47.2 PARTS BY WEIGHT OF CALCIUM IN COMBINED FORM AS CALCIUM FLUORIDE AND CALCIUM CARBONATE, FROM 3.0 TO 12.0 PARTS BY WEIGHT OF ALUMINA, FROM 17.0 TO 26.0 PARTS BY WEIGHT OF SILICA AND FROM 2.0 TO 6.0 PARTS BY WEIGHT OF IRON OXIDE; (B) CALCINING SAID KILM FEED MIXTURE AT A MAXIMUM TEMPERATURE OF BETWEEN 1000*C. AND 1450*C. WHILE PASSING STEAM OVER SAID MIXTURE; (C) RECOVERING THE EFFUENT KILN GASES CONTAINING HYDROFLUORIC ACID; AND (D) RECOVERING A PORTLAND CEMENT CLINKER FROM THE SUBSTANTIALLY DEFLUORINATED REACTION PRODUCTS OF THE CALCINATION.
Claim 2
Dependent Claim
141 words
A PROCESS FOR THE JOINT MANUFACTURE OF HYDROFLUORIC ACID AND PORTLAND CEMENT CLINKER WHICH COMPRISES THE STEPS OF: (A) FEEDING A MIXTURE OF A CALCIUM FLUORIDE-CONTAINING MATERIAL, A SOURCE OF ALUMINA, A SOURCE OF SILICA AND A SOURCE OF IRON OXIDE TO A ROTARY KILN, SAID MIXTURE CONTAINING FROM 40.8 TO 47.2 PARTS BY WEIGHT OF CALCIUM IN COMBINED FORM AS CALCIUM FLUORIDE AND CALCIUM CARBONATE, FROM 3.0 TO 12.0 PARTS BY WEIGHT OF ALUMINA, FROM 17.0 TO 26.0 PARTS BY WEIGHT OF SILICA AND FROM 2.0 TO 6.0 PARTS BY WEIGHT OF IRON OXIDE; (B) CALCINING SAID KILM FEED MIXTURE AT A MAXIMUM TEMPERATURE OF BETWEEN 1000*C. AND 1450*C. WHILE PASSING STEAM OVER SAID MIXTURE; (C) RECOVERING THE EFFUENT KILN GASES CONTAINING HYDROFLUORIC ACID; AND (D) RECOVERING A PORTLAND CEMENT CLINKER FROM THE SUBSTANTIALLY DEFLUORINATED REACTION PRODUCTS OF THE CALCINATION.
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) | 1965-01-15 | 1965-07-17 | 1966-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-15 | 1969-07-17 | 1970-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-15 | 1973-07-17 | 1974-01-16 | $7700.00 | Window Closed / Lapsed |