Patent US3528774A successfully refreshed from Google Patents.
US3528774A
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US
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Formation of high modulus,high strength graphite yarns
Assignee: United States Department of the Air Force
•
Filing: 1967-03-14
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Granted: 1970-09-15
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Expires: 1987-03-14
Abstract
No abstract record available.
Inventors
- 👤 Herbert M Ezekiel
- 👤 Raymond G Spain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:14
CPC Classifications
D; D01; D01F; D01F9/00; D01F9/08; D01F9/12; D01F9/14; D01F9/20; D01F9/24; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US3427120A
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US3412062A
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US3410834A
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US3357956A
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US3441378A
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US3449077A
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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) | 1973-09-14 | 1974-03-16 | 1974-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-09-14 | 1978-03-16 | 1978-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-09-14 | 1982-03-16 | 1982-09-15 | $7700.00 | Window Closed / Lapsed |