US3108007A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of making refractory brick
Assignee: —
•
Filing: —
•
Granted: 1963-10-22
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Expires: 1980-10-22
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/03; C04B35/04; C04B35/043; C04B35/66; F; F27; F27D; F27D1/00; F27D1/0003; F27D1/0006; C04B2235/00; C04B2235/02; C04B2235/30; C04B2235/32; C04B2235/3205; C04B2235/3206; C04B2235/3208; C04B2235/3217; C04B2235/327; C04B2235/3272; C04B2235/34; C04B2235/3418; C04B2235/50; C04B2235/54; C04B2235/5418; C04B2235/5427; C04B2235/70; C04B2235/72
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
133 words
THE PROCESS OF MAKING A REFRACTORY WHICH COMPRISES MIXING TOGETHER PARTICLES OF MAGNESIA HAVING MORE THAN 2 PERCENT BY WEIGHT OF FERRIC OXIDE, HAVING LIME AND SILICA AS IMPURITIES IN A RATIO BY WEIGHT OF BETWEEN TWO AND FOURTEEN AND HAVING DICALCIUM FERRITE PRESENT AS A MINERALOGICAL COMPONENT AND BETWEEN 10 AND 35% ON THE TOTAL WEIGHT OF THE REFRACTORY MIXTURE OF CHROME ORE HAVING A MOL RATIO OF AL2O3+CR2O3 TO MGO WHICH EXCEEDS ABOUT 1.75 AND CONTAINING SILICA BETWEEN 1 AND 4%, THE RATIO OF LIME TO SILICA IN THE MIXTURE BEING IN EXCESS OF 1.0, AND HEATING THE MIXTURE OF SAID MAGNESIA AND CHROME ORE TO A TEMPERATURE OF BETWEEN 1000* AND 1700* C., AND THEREBY REACTING THE COMPONENTS TO IMPROVE THE STRENGTH OF THE REFRACTORY AT INTERMEDIATE AND HIGH TEMPERATURES.
Claim 2
Dependent Claim
133 words
THE PROCESS OF MAKING A REFRACTORY WHICH COMPRISES MIXING TOGETHER PARTICLES OF MAGNESIA HAVING MORE THAN 2 PERCENT BY WEIGHT OF FERRIC OXIDE, HAVING LIME AND SILICA AS IMPURITIES IN A RATIO BY WEIGHT OF BETWEEN TWO AND FOURTEEN AND HAVING DICALCIUM FERRITE PRESENT AS A MINERALOGICAL COMPONENT AND BETWEEN 10 AND 35% ON THE TOTAL WEIGHT OF THE REFRACTORY MIXTURE OF CHROME ORE HAVING A MOL RATIO OF AL2O3+CR2O3 TO MGO WHICH EXCEEDS ABOUT 1.75 AND CONTAINING SILICA BETWEEN 1 AND 4%, THE RATIO OF LIME TO SILICA IN THE MIXTURE BEING IN EXCESS OF 1.0, AND HEATING THE MIXTURE OF SAID MAGNESIA AND CHROME ORE TO A TEMPERATURE OF BETWEEN 1000* AND 1700* C., AND THEREBY REACTING THE COMPONENTS TO IMPROVE THE STRENGTH OF THE REFRACTORY AT INTERMEDIATE AND HIGH TEMPERATURES.
References Cited (Backward Citations)
US2571134A
Cited
US2775525A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-10-21 | 1967-04-22 | 1967-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-10-21 | 1971-04-22 | 1971-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-10-21 | 1975-04-22 | 1975-10-22 | $7700.00 | Window Closed / Lapsed |