US2830348A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refractory materials
Assignee: The General Electric Company PLC
•
Filing: 1952-03-04
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Granted: 1958-04-15
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Expires: 1972-03-04
Abstract
No abstract record available.
Inventors
- 👤 Busby Terence Stanley
- 👤 Manners Maurice
- 👤 Partridge John Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:35
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A METHOD OF MANUFACTURING A COHERENT BODY OF REFRACTORY MATERIAL CONSISTING ESSENTIALLY OF CRYSTALS OF MULLITE, CRYSTALS OF ZIRCON AND CRYSTALS OF ZIRCONIA, AND A VITREOUS BONDING MEDIUM CONSISTING ESSENTIALLY OF SILICA BONDING TOGETHER THE CRYSTALS OF ZIRCON AND ZIRCONIA, THE MULLITE CRYSTALS BEING IN THE VITREOUS BONDING MEDIUM AND CONIA, WHICH METHOD COMPRISES THE STEPS OF PREPARING A MIXTURE CONSISTING ESSENTIALLY OF 40% TO 80% FINELY GROUND ZIRCON, 20% TO 60% SUBSTANTIALLY PURE CHINA CLAY, AND 0 TO 40% UNCOMBINED ALUMINA BY WEIGHT, MOULDING THE SAID MIXTURE TO A DESIRED SHAPE, AND HEATING THE SAID MIXTURE FOR A PERIOD OF AT LEAST 3 HOURS AT A TEMPERATURE WITHIN THE RANGE OF 1500*C. TO 1650*C. SUCH THAT SOME FREE ZIRCONIA IS PRESENT IN THE PRODUCT AND ALL THE ALUMINA IS COMBINED WITH SILICA IN THE FORM OF MULLITE.
References Cited (Backward Citations)
US1682251A
Cited
US1440657A
Cited
US1375077A
Cited
US1412016A
Cited
US1615751A
Cited
US1862191A
Cited
US1811242A
Cited
US1816006A
Cited
GB396532A
Cited
US2271366A
Cited
US2303304A
Cited
GB610334A
Cited
US2335325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-04-14 | 1961-10-14 | 1962-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-04-14 | 1965-10-14 | 1966-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-04-14 | 1969-10-14 | 1970-04-15 | $7700.00 | Window Closed / Lapsed |