US3433430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fabric windup mechanism
Assignee: Draper Corp
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Filing: 1968-05-17
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Granted: 1969-03-18
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Expires: 1988-05-17
Abstract
No abstract record available.
Inventors
- 👤 Frederick L Sprague
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:28
CPC Classifications
B; B65; B65H; B65H18/00; B65H18/08; B65H18/14; B65H18/20; D; D03; D03D; D03D49/00; D03D49/04; D03D49/20
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) | 1972-03-17 | 1972-09-16 | 1973-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-17 | 1976-09-16 | 1977-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-17 | 1980-09-16 | 1981-03-18 | $7700.00 | Window Closed / Lapsed |