Patent US3781398A successfully refreshed from Google Patents.
US3781398A
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Hook fastener element and method of manufacture
Assignee: American Velcro Inc
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Filing: 1972-05-11
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Granted: 1973-12-25
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Expires: 1992-05-11
Abstract
Abstract A hook fastener element formed from extruded stock having a base sheet and adjacent longitudinally arranged parallel members of generally heart-shaped cross section integrally connected to said base and apparatus and method for forming hooks from said extruded stock.
Inventors
- 👤 G Erb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:48
CPC Classifications
A; A44; A44B; A44B18/00; A44B18/0046; A44B18/0049; Y; Y10; Y10S; Y10S425/00; Y10S425/814; Y10T; Y10T29/00; Y10T29/49; Y10T29/49799
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) | 1976-12-24 | 1977-06-25 | 1977-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-24 | 1981-06-25 | 1981-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-24 | 1985-06-25 | 1985-12-25 | $7700.00 | Window Closed / Lapsed |