US3407090A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers of submicroscopic beta-silicon carbide crystals with sheath of silica
Assignee: Corning Glass Works
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Filing: 1965-12-07
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Granted: 1968-10-22
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Expires: 1985-12-07
Abstract
No abstract record available.
Inventors
- 👤 Hertl William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:02
CPC Classifications
C; C04; C04B; C04B35/00; C04B35/622; C04B35/62227; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C30; C30B; C30B25/00; C30B25/005; C30B29/00; C30B29/10; C30B29/36
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3246950A
Cited
US3166380A
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US3175884A
Cited
US3161473A
Cited
US3271109A
Cited
US3335049A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-10-22 | 1972-04-22 | 1972-10-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-22 | 1976-04-22 | 1976-10-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-22 | 1980-04-22 | 1980-10-22 | $7700.00 | Window Closed / Lapsed |