US2658814A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing active magnesium oxide
Assignee: FMC Corp
•
Filing: 1948-11-24
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Granted: 1953-11-10
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Expires: 1968-11-24
Abstract
No abstract record available.
Inventors
- 👤 Woodward Teynham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:59
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/08; C01P; C01P2006/00; C01P2006/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
A PROCESS FOR PRODUCING MAGNESIAS OF MAGNESIUM OXYCHLORIDE CEMENT GRADE FROM MAGNESIUM HYDROXIDE PRECIPITATED FROM SEA WATER BITTERN WHICH COMPRISES BURNING SAID MAGNESIUM HYDROXIDE PRECIPITATE AT A HIGH TEMPERATURE OF FROM ABOUT 1200* TO 1800* C. UNTIL SINTERING HAS COMMENCED, THEREAFTER HYDRATING THE SINTERED MAGNESIA OBTAINED AND FINALLY LIGHT BURNING THE RESULTING HYDRATED MASS AT A TEMPERATURE BETWEEN ABOUT 600* AND 900* C. TO PROVIDE ACTIVE MAGNESIA OF MAGNESIUM OXYCHLORIDE GRADE.
Claim 2
Dependent Claim
71 words
A PROCESS FOR PRODUCING MAGNESIAS OF MAGNESIUM OXYCHLORIDE CEMENT GRADE FROM MAGNESIUM HYDROXIDE PRECIPITATED FROM SEA WATER BITTERN WHICH COMPRISES BURNING SAID MAGNESIUM HYDROXIDE PRECIPITATE AT A HIGH TEMPERATURE OF FROM ABOUT 1200* TO 1800* C. UNTIL SINTERING HAS COMMENCED, THEREAFTER HYDRATING THE SINTERED MAGNESIA OBTAINED AND FINALLY LIGHT BURNING THE RESULTING HYDRATED MASS AT A TEMPERATURE BETWEEN ABOUT 600* AND 900* C. TO PROVIDE ACTIVE MAGNESIA OF MAGNESIUM OXYCHLORIDE GRADE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-11-09 | 1957-05-11 | 1957-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-09 | 1961-05-11 | 1961-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-09 | 1965-05-11 | 1965-11-10 | $7700.00 | Window Closed / Lapsed |