US3767774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surface treatment of previously graphitized carbonaceous fibers
Assignee: Celanese Corp
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Filing: 1971-08-12
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Granted: 1973-10-23
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Expires: 1991-08-12
Abstract
Abstract MODIFIED IN ACCORDANCE WITH THE PRESENT PROCESS IN A RESINOUS MATRIX MATERIAL. AN IMPROVED PROCESS IS PROVIDED FOR MODIFYING THE SURFACE CHARACTERISTICS OF A PREDOMINANTLY GRAPHITIC CARBONACEOUS FIBROUS MATERIAL THEREBY TO FACILITATE ENHANCED ADHESION BETWEEN THE FIBROUS MATERIAL AND A MATRIX MATERIAL. THE FIBROUS MATERIAL IS CONTINUOUSLY PASSED FOR AN EXTEREMELY BRIEF RESIDENCE TIME TRANSVERSELY THROUGH THE TIP OF AN INERT GAS THERMAL PLASMA PRESENT IN AN OPEN ATMOSPHERE. COMPOSITED ARTICLES OF ENHANCED INTERLAMINAR SHEAR STRENGTH MAY BE FORMED BY INCORATING THE FIBERS
Inventors
- 👤 K Hou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:27
CPC Classifications
H; H01; H01J; H01J37/00; H01J37/32; C; C22; C22C; C22C49/00; C22C49/14; D; D01; D01F; D01F11/00; D01F11/10; D01F11/16; H05; H05H; H05H1/00; H05H1/24; H05H1/26; H05H1/30; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |