US3528774A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation of high modulus,high strength graphite yarns
Assignee: United States Department of the Air Force
•
Filing: 1967-03-14
•
Granted: 1970-09-15
•
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 18:54
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
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US3094511A
Cited
US3285696A
Cited
US3179634A
Cited
US3174947A
Cited
US3427120A
Cited
US3412062A
Cited
US3410834A
Cited
US3357956A
Cited
US3441378A
Cited
US3449077A
Cited
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 |