US2621131A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of consolidating refractory materials
Assignee: Canadian Refractories Ltd
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Filing: 1949-03-30
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Granted: 1952-12-09
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Expires: 1969-03-30
Abstract
No abstract record available.
Inventors
- 👤 Frank E Lathe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:36
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
166 words
A METHOD OF CONSOLIDATING REFRACTORY GRANULAR PARTICLES INTO A MECHANICALLY STRONG AND HIGHLY REFRACTORY PRODUCT WHICH COMPRISES MIXING REFRACTORY GRANULAR PARTICLES CONTAINING, ON THE BURNED BASIS, A TOTAL OF NOT LESS THAN 80% BY WEIGHT OF LIME PLUS MAGNESIA PLUS SILICA, AND IN WHICH THE WEIGHT RATIO OF LIME TO SILICA IS NOT LESS THAN 2.1, WITH NON-REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF A TOTAL OF NOT LESS THAN 75% BY WEIGHT OF SILICA PLUS LIME PLUS MAGNESIA AND HAVING A COMPOSITION FALLING WITHIN THE RECTILINEAR PENTAGONAL AREA A IN THE LIME-MAGNESIASILICA PHASE EQUILIBRIUM DIAGRAM FIGURE 3, IN SUCH PROPORTIONS OF REFRACTORY AND NON-REFRACTORY MATERIALS THAT THE WEIGHT RATIO OF LIME TO SILICA IN THE OVER-ALL MIXTURE IS NOT SUBSTANTIALLY LESS THAN 1.87, AND HEATING THE MIXURE TO A TEMPERATURE HIGHER THAN THAT OF INCIPIENT FUSION OF THE NON-REFRACTORY MATERIAL AND NOT LESS THAN 1321* C. FORM LIQUID, AND CONTINUING THE HEAT TREATMENT UNTIL THE LIQUID CHEMICALLY REACTS WITH SAID GRANULAR REFRACTORY MATERIAL AND CONSOLIDATES THE MASS.
Claim 2
Independent Claim
166 words
A METHOD OF CONSOLIDATING REFRACTORY GRANULAR PARTICLES INTO A MECHANICALLY STRONG AND HIGHLY REFRACTORY PRODUCT WHICH COMPRISES MIXING REFRACTORY GRANULAR PARTICLES CONTAINING, ON THE BURNED BASIS, A TOTAL OF NOT LESS THAN 80% BY WEIGHT OF LIME PLUS MAGNESIA PLUS SILICA, AND IN WHICH THE WEIGHT RATIO OF LIME TO SILICA IS NOT LESS THAN 2.1, WITH NON-REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF A TOTAL OF NOT LESS THAN 75% BY WEIGHT OF SILICA PLUS LIME PLUS MAGNESIA AND HAVING A COMPOSITION FALLING WITHIN THE RECTILINEAR PENTAGONAL AREA A IN THE LIME-MAGNESIASILICA PHASE EQUILIBRIUM DIAGRAM FIGURE 3, IN SUCH PROPORTIONS OF REFRACTORY AND NON-REFRACTORY MATERIALS THAT THE WEIGHT RATIO OF LIME TO SILICA IN THE OVER-ALL MIXTURE IS NOT SUBSTANTIALLY LESS THAN 1.87, AND HEATING THE MIXURE TO A TEMPERATURE HIGHER THAN THAT OF INCIPIENT FUSION OF THE NON-REFRACTORY MATERIAL AND NOT LESS THAN 1321* C. FORM LIQUID, AND CONTINUING THE HEAT TREATMENT UNTIL THE LIQUID CHEMICALLY REACTS WITH SAID GRANULAR REFRACTORY MATERIAL AND CONSOLIDATES THE MASS.
References Cited (Backward Citations)
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US1300631A
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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) | 1955-12-09 | 1956-06-09 | 1956-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-09 | 1960-06-09 | 1960-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-09 | 1964-06-09 | 1964-12-09 | $7700.00 | Window Closed / Lapsed |