US2656280A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilizing chrome ores of the transvaal type for refractory brick
Assignee: General Refractories Co
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Filing: 1952-01-12
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Granted: 1953-10-20
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Expires: 1972-01-12
Abstract
No abstract record available.
Inventors
- 👤 Heuer Russell Pearce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 13:16
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/42; C04B35/12; C04B35/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
THE PROCESS OF STABILIZING CHROME ORE HAVING A MOL RATIO OF AL2O3 PLUS CR2O3 TO MGO EXCEEDING 1.75 FOR REFRACTORY BRICK PURPOSES, WHICH COMPRISES MIXING CHROME ORE HAVING A MOL RATIO OF AL2O3 PLUS CR2O3 TO MGO EXCEEDING 1.75 (THE MOL RATIO DETERMINATION HAVING BEEN MADE ON A SAMPLE FROM WHICH SILICA WAS REMOVED) WITH MAGNESIA IN THE PROPORTIONS OF 20 TO 80 PERCENT BY WEIGHT OF MAGNESIA, AND FORMING THE MIXTURE INTO A REFRACTORY BRICK.
Claim 2
Dependent Claim
76 words
THE PROCESS OF STABILIZING CHROME ORE HAVING A MOL RATIO OF AL2O3 PLUS CR2O3 TO MGO EXCEEDING 1.75 FOR REFRACTORY BRICK PURPOSES, WHICH COMPRISES MIXING CHROME ORE HAVING A MOL RATIO OF AL2O3 PLUS CR2O3 TO MGO EXCEEDING 1.75 (THE MOL RATIO DETERMINATION HAVING BEEN MADE ON A SAMPLE FROM WHICH SILICA WAS REMOVED) WITH MAGNESIA IN THE PROPORTIONS OF 20 TO 80 PERCENT BY WEIGHT OF MAGNESIA, AND FORMING THE MIXTURE INTO A REFRACTORY BRICK.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-10-19 | 1957-04-20 | 1957-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-10-19 | 1961-04-20 | 1961-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-10-19 | 1965-04-20 | 1965-10-20 | $7700.00 | Window Closed / Lapsed |