US3447952A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of silicon carbide fibers
Assignee: Corning Glass Works
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Filing: 1965-12-07
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Granted: 1969-06-03
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Expires: 1985-12-07
Abstract
No abstract record available.
Inventors
- 👤 William Hertl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 00:35
CPC Classifications
C; C30; C30B; C30B29/00; C30B29/10; C30B29/36; C01; C01B; C01B32/00; C01B32/90; C01B32/914; C01B32/956; C01B32/963; C01B32/97; C30B25/00; C30B25/005
Claims Analysis
Total Claims: 0
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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) | 1972-06-02 | 1972-12-02 | 1973-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-06-02 | 1976-12-02 | 1977-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-06-02 | 1980-12-02 | 1981-06-03 | $7700.00 | Window Closed / Lapsed |