US2637545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of magnesia and calcium carbonate
Assignee: Individual
•
Filing: 1949-12-13
•
Granted: 1953-05-05
•
Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hicguet Max
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:26
CPC Classifications
C; C04; C04B; C04B2/00; C04B2/10; C04B2/102; Y; Y02; Y02P; Y02P40/00; Y02P40/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A CONTINUOUS PROCESS FOR PRODUCING FROM RAW DOLOMITE, A MIXTURE OF MAGNESIUM OXIDE AND CALCIUM CARBONATE SUBSTANTIALLY FREE FROM LIME, THE STEPS OF RAPIDLY HEATING RAW DOLOMITE TO A TEMPERATURE OF THE RANGE 700-800* C. IN A CONFINED ZONE WHEREIN THE ATMOSPHERE SUBSTANTIALLY CONSISTS OF CARBON DIOXIDE SO AS TO CAUSE CALCINATION OF SAID DOLOMITE, MAINTAINING SAID DOLOMITE AT SAID TEMPERATURE IN SAID ZONE IN SAID ATMOSPHERE FOR A PERIOD OF 2 TO 15 MINUTES, THEN GRADUALLY COOLING SAID DOLOMITE IN SAID CONFINED ZONE STILL IN SAID ATMOSPHERE TO REACH A TEMPERATURE OF 500* C. WITHIN 5 TO 30 MINUTES, AND THEREAFTER WITHDRAWING SAID DOLOMITE FROM SAID CONFINED ZONE.
Claim 2
Dependent Claim
110 words
IN A CONTINUOUS PROCESS FOR PRODUCING FROM RAW DOLOMITE, A MIXTURE OF MAGNESIUM OXIDE AND CALCIUM CARBONATE SUBSTANTIALLY FREE FROM LIME, THE STEPS OF RAPIDLY HEATING RAW DOLOMITE TO A TEMPERATURE OF THE RANGE 700-800* C. IN A CONFINED ZONE WHEREIN THE ATMOSPHERE SUBSTANTIALLY CONSISTS OF CARBON DIOXIDE SO AS TO CAUSE CALCINATION OF SAID DOLOMITE, MAINTAINING SAID DOLOMITE AT SAID TEMPERATURE IN SAID ZONE IN SAID ATMOSPHERE FOR A PERIOD OF 2 TO 15 MINUTES, THEN GRADUALLY COOLING SAID DOLOMITE IN SAID CONFINED ZONE STILL IN SAID ATMOSPHERE TO REACH A TEMPERATURE OF 500* C. WITHIN 5 TO 30 MINUTES, AND THEREAFTER WITHDRAWING SAID DOLOMITE FROM SAID CONFINED ZONE.
References Cited (Backward Citations)
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Cited
US1495813A
Cited
US2155138A
Cited
GB498372A
Cited
US2210892A
Cited
US2373749A
Cited
US2359792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |