US2871133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Inorganic dust treatment process
Assignee: Peerless Cement Corp
•
Filing: 1956-12-10
•
Granted: 1959-01-27
•
Expires: 1976-12-10
Abstract
No abstract record available.
Inventors
- 👤 Carl V Palonen
- 👤 Elbert W Kaiser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:14
CPC Classifications
C; C04; C04B; C04B7/00; C04B7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
THE PROCESS OF TREATING CEMENT KILN FLUE DUST WHICH HAS THEREIN THEORETICAL ALKALIES WHICH ARE NOT READILY SOLUBLE IN AN AQUEOUS MEDIUM, WHICH COMPRISES HEATING THE DUST TO A TEMPERATURE OF AT LEAST 1000* F. IN AN OVEN FOR A TIME SUFFICIENT TO INCREASE THE SOLUBILITY OF THE ALKALIES IN AN AQUEOUS MEDIUM, TREATING THE RESULTANT HEATTREATED DUST WITH AN AQUEOUS MEDIUM TO DISSOLVE A SUBSTANTIAL AMOUNT OF THE WATER-SOLUBLE MATERIALS, AND SEPARATING SAID AQUEOUS MEDIUM FROM THE SOLID PARTICLES OF THE TREATED DUST.
Claim 2
Dependent Claim
84 words
THE PROCESS OF TREATING CEMENT KILN FLUE DUST WHICH HAS THEREIN THEORETICAL ALKALIES WHICH ARE NOT READILY SOLUBLE IN AN AQUEOUS MEDIUM, WHICH COMPRISES HEATING THE DUST TO A TEMPERATURE OF AT LEAST 1000* F. IN AN OVEN FOR A TIME SUFFICIENT TO INCREASE THE SOLUBILITY OF THE ALKALIES IN AN AQUEOUS MEDIUM, TREATING THE RESULTANT HEATTREATED DUST WITH AN AQUEOUS MEDIUM TO DISSOLVE A SUBSTANTIAL AMOUNT OF THE WATER-SOLUBLE MATERIALS, AND SEPARATING SAID AQUEOUS MEDIUM FROM THE SOLID PARTICLES OF THE TREATED DUST.
References Cited (Backward Citations)
US1124798A
Cited
US1239616A
Cited
US1220989A
Cited
US1249708A
Cited
US1354642A
Cited
US2244194A
Cited
GB713546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-01-26 | 1962-07-28 | 1963-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-26 | 1966-07-28 | 1967-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-26 | 1970-07-28 | 1971-01-27 | $7700.00 | Window Closed / Lapsed |