US3081155A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making magnesium oxide
Assignee: Unifrax I LLC
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Filing: 1958-10-09
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Granted: 1963-03-12
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Expires: 1978-10-09
Abstract
No abstract record available.
Inventors
- 👤 Frank J Dinan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:14
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01B; C01B7/00; C01B7/01; C01B7/03; C01P; C01P2006/00; C01P2006/80
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A METHOD OF MAKING HIGH PURITY MAGNESIUM OXIDE WHICH COMPRISES FORMING A MASS OF INFUSIBLE, BASIC MAGNESIUM CHLORIDE CONTAINING MGO, MGCL2 AND H2O IN A MOLAR RATIO OF APPROXIMATELY 1.7:1:12, RESPECTIVELY, CALCINING SAID MASS IN A CLOSED CHAMBER AND WHILE EXCLUDING EXTRANEOUS GASES TO A TEMPERATURE OF ABOUT 900*C.1000*C., WHEREBY TO DECOMPOSE SAID MASS TO FORM MAGNESIUM OXIDE, HYDROGEN CHLORIDE AND STEAM, AND CONTINUOUSLY WITHDRAWING THE EVOLVED HYDROGEN CHLORIDE AND STEAM TO LEAVE, UPON COMPLETION OF THE CALCINING, A SOLID RESIDUE OF HIGH PURITY MAGNESIUM OXIDE.
References Cited (Backward Citations)
US2413292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |