US2590566A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrothermal synthesis of forsterite
Assignee: Harbison Walker Refractories Co
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Filing: 1949-06-22
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Granted: 1952-03-25
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Expires: 1969-06-22
Abstract
No abstract record available.
Inventors
- 👤 Elburt F Osborn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:01
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
73 words
THAT METHOD OF SYNTHESIZING FORSTERITE HYDROTHERMALLY THAT COMPRISES HEATING A MIXTURE OF A FINELY DIVIDED MATERIAL CONTAINING A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF MAGNESIA AND MAGNESIUM CARBONATE AND FINELY DIVIDED MATERIAL CONTAINING A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF SILICA AND SILICATES TO AT LEAST ABOUT 500* C. IN A CLOSED SYSTEM IN THE PRESENCE OF WATER VAPOR UNDER A PRESSURE OF AT LEAST ABOUT 350 POUNDS PER SQUARE INCH.
Claim 2
Dependent Claim
73 words
THAT METHOD OF SYNTHESIZING FORSTERITE HYDROTHERMALLY THAT COMPRISES HEATING A MIXTURE OF A FINELY DIVIDED MATERIAL CONTAINING A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF MAGNESIA AND MAGNESIUM CARBONATE AND FINELY DIVIDED MATERIAL CONTAINING A COMPOUND CHOSEN FROM THE GROUP CONSISTING OF SILICA AND SILICATES TO AT LEAST ABOUT 500* C. IN A CLOSED SYSTEM IN THE PRESENCE OF WATER VAPOR UNDER A PRESSURE OF AT LEAST ABOUT 350 POUNDS PER SQUARE INCH.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-25 | 1955-09-24 | 1956-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-25 | 1959-09-24 | 1960-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-25 | 1963-09-24 | 1964-03-25 | $7700.00 | Window Closed / Lapsed |