Patent US2675323A successfully refreshed from Google Patents.
US2675323A
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US
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Refractory materials
Assignee: The General Electric Company PLC
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Filing: 1951-01-10
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Granted: 1954-04-13
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Expires: 1971-01-10
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
2026-11-07 20:27
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A COHERENT BODY OF REFRACTORY MATERIAL CONSISTING SUBSTANTIALLY OF CRYSTALS OF ZIRCONIUM SILICATE, AND CRYSTALS OF MULLITE AND A VITREOUS MATRIX CONSISTING ESSENTIALLY OF SILICA, IN THE ABSENCE OF FLUXES, BONDING THE CRYSTALS OF ZIRCONIUM SILICATE TOGETHER, THE MULLITE CRYSTALS BEING IN THE VITEOUS MATRIX AND FILLING THE INTERSTICES BETWEEN THE ZIRCONIUM SILICATE CRYSTALS, THE PROPORTION OF VITREOUS MATRIX BEING LESS THAN 20% BY WEIGHT OF THE BODY AND THE PROPORTION OF ZIRCONIUM SILICATE BEING BETWEEN 40% AND 85% BY WEIGHT OF THE BODY.
Claim 2
Dependent Claim
84 words
A COHERENT BODY OF REFRACTORY MATERIAL CONSISTING SUBSTANTIALLY OF CRYSTALS OF ZIRCONIUM SILICATE, AND CRYSTALS OF MULLITE AND A VITREOUS MATRIX CONSISTING ESSENTIALLY OF SILICA, IN THE ABSENCE OF FLUXES, BONDING THE CRYSTALS OF ZIRCONIUM SILICATE TOGETHER, THE MULLITE CRYSTALS BEING IN THE VITEOUS MATRIX AND FILLING THE INTERSTICES BETWEEN THE ZIRCONIUM SILICATE CRYSTALS, THE PROPORTION OF VITREOUS MATRIX BEING LESS THAN 20% BY WEIGHT OF THE BODY AND THE PROPORTION OF ZIRCONIUM SILICATE BEING BETWEEN 40% AND 85% BY WEIGHT OF THE BODY.
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) | 1957-04-12 | 1957-10-12 | 1958-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-04-12 | 1961-10-12 | 1962-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-04-12 | 1965-10-12 | 1966-04-13 | $7700.00 | Window Closed / Lapsed |