Patent US3372019A successfully refreshed from Google Patents.
Patent US2809880A successfully refreshed from Google Patents.
US2809880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of magnesium oxide
Assignee: International Minerals and Chemical Corp
•
Filing: 1955-05-05
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Granted: 1957-10-15
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Expires: 1975-05-05
Abstract
No abstract record available.
Inventors
- 👤 William B Dancy
- 👤 Gunter H Gloss
- 👤 Walter R Shaw
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:31
CPC Classifications
C; C01; C01F; C01F5/00; C01F5/02; C01F5/06; C01F5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
64 words
A PROCESS FOR PRODUCING MAGNESIUM OXIDE COMPRISING DECOMPOSING, WITHOUT SUBSTANTIAL MELTING, A SOLID PHASE MAGNESIUM CHLORIDE HYDRATE CONTAINING AN AVERAGE OF BETWEEN ABOUT 1.5 MOLS AND ABOUT 3.0 MOLS OF WATER OF HYDRATION PER MOL OF MAGNESIUM CHLORIDE BY HEATING A MOVING BED OF SAID SOLID PHASE MAGNESIUM CHLORIDE HYDRATE WITH HOT COMBUSTION GASES MOVING CONCURRENTLY WITH SAID BED TO A DECOMPOSITION TEMPERATURE OF
Claim 2
Dependent Claim
64 words
A PROCESS FOR PRODUCING MAGNESIUM OXIDE COMPRISING DECOMPOSING, WITHOUT SUBSTANTIAL MELTING, A SOLID PHASE MAGNESIUM CHLORIDE HYDRATE CONTAINING AN AVERAGE OF BETWEEN ABOUT 1.5 MOLS AND ABOUT 3.0 MOLS OF WATER OF HYDRATION PER MOL OF MAGNESIUM CHLORIDE BY HEATING A MOVING BED OF SAID SOLID PHASE MAGNESIUM CHLORIDE HYDRATE WITH HOT COMBUSTION GASES MOVING CONCURRENTLY WITH SAID BED TO A DECOMPOSITION TEMPERATURE OF
References Cited (Backward Citations)
US2473534A
Cited
US2413292A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-10-14 | 1961-04-15 | 1961-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-10-14 | 1965-04-15 | 1965-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-10-14 | 1969-04-15 | 1969-10-15 | $7700.00 | Window Closed / Lapsed |