US2553265A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making zircon refractory
Assignee: Corning Glass Works
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Filing: 1947-11-06
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Granted: 1951-05-15
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Expires: 1967-11-06
Abstract
No abstract record available.
Inventors
- 👤 John M Mochel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:56
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF MAKING A DENSE, NON-POROUS REFRACTORY BODY POSSESSING INCREASED RESISTANCE TO CORROSION BY MOLTEN GLASS FORM FINELY PULVERIZED ZIRCON CONTAINING FREE SIO2, WHICH COMPRISES PREPARING A MIXTURE CONSISTING ESSENTIALLY OF SUCH ZIRCON, FINELY DIVIDED ZRO2 IN SUBSTANTIALLY THE STOICHIOMETRIC PROPORTION TO FORM ZRSIO4 WITH THE FREE SIO2, ABOUT 1% OF FINELY DIVIDED TIO2, AND THE INDICATED PROPORTION OF A FINELY DIVIDED METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ABOUT 1% OF AN OXIDE OF MANGANESE COMPUTED AS MNO AND ABOUT 1% OF AN OXIDE OF IRON COMPUTED AS FEO, FORMING SLIP FROM SUCH MIXTURE, MOLDING THE SLIP TO FORM A BODY OF DESIRED SHAPE, AND FIRING THE SHAPED BODY AT A TEMPERATURE OF AT LEAST 1500* C.
Claim 2
Independent Claim
120 words
THE METHOD OF MAKING A DENSE, NON-POROUS REFRACTORY BODY POSSESSING INCREASED RESISTANCE TO CORROSION BY MOLTEN GLASS FORM FINELY PULVERIZED ZIRCON CONTAINING FREE SIO2, WHICH COMPRISES PREPARING A MIXTURE CONSISTING ESSENTIALLY OF SUCH ZIRCON, FINELY DIVIDED ZRO2 IN SUBSTANTIALLY THE STOICHIOMETRIC PROPORTION TO FORM ZRSIO4 WITH THE FREE SIO2, ABOUT 1% OF FINELY DIVIDED TIO2, AND THE INDICATED PROPORTION OF A FINELY DIVIDED METAL OXIDE SELECTED FROM THE GROUP CONSISTING OF ABOUT 1% OF AN OXIDE OF MANGANESE COMPUTED AS MNO AND ABOUT 1% OF AN OXIDE OF IRON COMPUTED AS FEO, FORMING SLIP FROM SUCH MIXTURE, MOLDING THE SLIP TO FORM A BODY OF DESIRED SHAPE, AND FIRING THE SHAPED BODY AT A TEMPERATURE OF AT LEAST 1500* C.
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) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |