US3687712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wear resistant nonwoven fabric
Assignee: Individual
•
Filing: 1968-04-16
•
Granted: 1972-08-29
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Expires: 1988-04-16
Abstract
Abstract NONWOVEN FABRIC MADE UP OF SUBSTANTIALLY CONTINUOUS FILAMENTS HAVING A RELATIVELY LOW DENIER AND IMPREGNATED WITH BINDER MATERIAL CONCENTRATED AT BOTH MAJOR SURFACES THEREOF. METHOD OF MAKING SUCH BONDED FABRIC BY INTRODUCING BINDER IN THE FORM OF A FOAM ONTO BOTH SURFACES OF A NONWOVEN FLEECE, PREFERABLY SEQUENTIALLY, AND DRYING SUCH BINDER IN A MANNER SUCH THAT THE BINDER PARTICLES TEND TO MIGRATE AND CONCENTRATE AT THE FABRIC SURFACE.
Inventors
- 👤 Ludwig Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:35
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/12; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31743; Y10T428/31855; Y10T428/31935; Y10T442/00; Y10T442/60; Y10T442/647; Y10T442/652
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |