US2628915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing refractory bonding material
Assignee: Kaiser Aluminum and Chemical Corp
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Filing: 1949-01-12
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Granted: 1953-02-17
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Expires: 1969-01-12
Abstract
No abstract record available.
Inventors
- 👤 Leslie W Austin
- 👤 James C Hicks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:47
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A REFRACTORY BOND-FORMING MATERIAL CONSISTING ESSENTIALLY OF A CALCINED MIXTURE OF FINELY DIVIDED MAGNESIA AND FROM ABOUT 20% TO ABOUT 60%, BASED ON THE TOTAL WEIGHT OF MGO AND SIO2, OF FINELY DIVIDED SILICA HAVING A SPECIFIC SURFACE OF AT LEAST 6000 SQUARE CENTIMETERS PER GRAM, SAID MATERIAL HAVING A SUBSTANTIAL PROPORTION OF THE MAGNESIA AND SILICA COMPONENTS PRESENT IN THE FORM OF SUBMICROSCOPIC CRYSTALS OF FORSTERITE AND HAVING A BULK DENSITY OF FROM ABOUT 45 TO ABOUT 85 POUNDS PER CUBIC FOOT WHEN OF A PARTICLE SIZE SUCH THAT SUBSTANTIALLY ALL PARTICLES ARE LESS THAN 200 MESH.
Claim 2
Dependent Claim
98 words
A REFRACTORY BOND-FORMING MATERIAL CONSISTING ESSENTIALLY OF A CALCINED MIXTURE OF FINELY DIVIDED MAGNESIA AND FROM ABOUT 20% TO ABOUT 60%, BASED ON THE TOTAL WEIGHT OF MGO AND SIO2, OF FINELY DIVIDED SILICA HAVING A SPECIFIC SURFACE OF AT LEAST 6000 SQUARE CENTIMETERS PER GRAM, SAID MATERIAL HAVING A SUBSTANTIAL PROPORTION OF THE MAGNESIA AND SILICA COMPONENTS PRESENT IN THE FORM OF SUBMICROSCOPIC CRYSTALS OF FORSTERITE AND HAVING A BULK DENSITY OF FROM ABOUT 45 TO ABOUT 85 POUNDS PER CUBIC FOOT WHEN OF A PARTICLE SIZE SUCH THAT SUBSTANTIALLY ALL PARTICLES ARE LESS THAN 200 MESH.
References Cited (Backward Citations)
US2434451A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-02-17 | 1956-08-18 | 1957-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-02-17 | 1960-08-18 | 1961-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-02-17 | 1964-08-18 | 1965-02-17 | $7700.00 | Window Closed / Lapsed |