Patent US3128194A successfully refreshed from Google Patents.
US3128194A
Expired / Lapsed
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Alkali resistant mullite refractory
Assignee: Babcock and Wilcox Co
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Filing: 1959-01-23
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Granted: 1964-04-07
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Expires: 1979-01-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Leonard D Christie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:54
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
66 words
A FIRED REFRACTORY SHAPE FORMED OF A DENSE IMPERVIOUS FUSED MULLITE GROG CONSISTING SUBSTANTIALLY ENTIRELY OF LARGE WELL-DEVELOPED INTERLOCKED MULLITE CRYSTALS, WITH AN ALUMINA CONTENT OF 60 TO 80% BY WEIGHT; AND A BONDING MATERIAL CONSISTING OF ALUMINA AND SILICA, THE ALUMINA CONSTITUTING FROM 25 TO 40% BY WEIGHT OF THE BONDING MATERIAL; THE PROPORTATION OF THE GROG AND BONDING MATERIAL BEING, RESPECTIVELY, 75-80% AND 25-20%.
Claim 2
Dependent Claim
66 words
A FIRED REFRACTORY SHAPE FORMED OF A DENSE IMPERVIOUS FUSED MULLITE GROG CONSISTING SUBSTANTIALLY ENTIRELY OF LARGE WELL-DEVELOPED INTERLOCKED MULLITE CRYSTALS, WITH AN ALUMINA CONTENT OF 60 TO 80% BY WEIGHT; AND A BONDING MATERIAL CONSISTING OF ALUMINA AND SILICA, THE ALUMINA CONSTITUTING FROM 25 TO 40% BY WEIGHT OF THE BONDING MATERIAL; THE PROPORTATION OF THE GROG AND BONDING MATERIAL BEING, RESPECTIVELY, 75-80% AND 25-20%.
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) | 1967-04-07 | 1967-10-07 | 1968-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-07 | 1971-10-07 | 1972-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-07 | 1975-10-07 | 1976-04-07 | $7700.00 | Window Closed / Lapsed |