US3798095A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for spreading a graphite fiber tow into a ribbon of graphite filaments
Assignee: Hercules LLC
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Filing: 1972-09-13
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Granted: 1974-03-19
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Expires: 1992-09-13
Abstract
Abstract A PROCESS FOR SPREADING A GRAPHITE FIBER TOW INTO A MASS OF SUBSTANTIALLY INDIVIDUAL GRAPHITE FILAMENTS IS PROVIDED. SPREADING OF THE FILAMENTS IS ACHIEVED BY VIBRATING THE GRAPHITE TOW IN AIR PULSATING AT A FREQUENCY AND IN TENSITY SUFFICIENT TO COUPLE THE ENERGY OF THE PULSATING MEDM TO THE GRAPHITE TOW. VIBRATION OF THE TOW IN AIR CAUSES SEPARATION AND SPREADING OF THE FILAMENTS IN THE TOW.
Inventors
- 👤 J Hall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:54
CPC Classifications
B; B29; B29B; B29B15/00; B29B15/08; B29B15/10; B29B15/12; B29B15/122; D; D02; D02J; D02J1/00; D02J1/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |