US2490825A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically conducting refractory compositions
Assignee: Corning Glass Works
•
Filing: 1946-02-01
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Granted: 1949-12-13
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Expires: 1966-02-01
Abstract
No abstract record available.
Inventors
- 👤 John M Mochel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:46
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; C; C04; C04B; C04B35/00; C04B35/01; H01B; H01B1/00; H01B1/06; H01B1/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1517618A
Cited
US1502421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-12 | 1953-06-13 | 1953-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-12 | 1957-06-13 | 1957-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-12 | 1961-06-13 | 1961-12-13 | $7700.00 | Window Closed / Lapsed |