US2908580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
End seal for electrical heating elements
Assignee: SAXONBURG CERAMIES
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Filing: 1957-03-29
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Granted: 1959-10-13
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Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 William C Stetson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:44
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/08; H01B3/087; C; C03; C03C; C03C10/00; C03C10/0054; C03C3/00; C03C3/04; C03C3/062; C03C3/064; C03C3/076; C03C3/089; C03C3/091; C03C3/093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
50 words
A CERAMIC MATERIAL FOR FORMING AN EXPANDED GLASSLIKE SEAL UPON BEING HEATED ABOVE 1800* F. BUT BELOW 2000*F., CONSISTING OF A MIXTURE OF 20 TO 30% KAOLIN, 20 TO 30% SILICA, 30 TO 40% ZIRCONIUM SILICATE, AND A FLUX INCLUDING THE COMBINATION OF THE OXIDES OF SODIUM, CALCIUM AND BORON.
Claim 2
Dependent Claim
50 words
A CERAMIC MATERIAL FOR FORMING AN EXPANDED GLASSLIKE SEAL UPON BEING HEATED ABOVE 1800* F. BUT BELOW 2000*F., CONSISTING OF A MIXTURE OF 20 TO 30% KAOLIN, 20 TO 30% SILICA, 30 TO 40% ZIRCONIUM SILICATE, AND A FLUX INCLUDING THE COMBINATION OF THE OXIDES OF SODIUM, CALCIUM AND BORON.
References Cited (Backward Citations)
US1682251A
Cited
US2665219A
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US1370276A
Cited
US2351128A
Cited
US2545877A
Cited
US2577369A
Cited
US2726963A
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FR1068157A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |