US3691004A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Matting of melt-spun amorphous polymer filaments and process
Assignee: Akzona Inc
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Filing: 1969-11-21
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Granted: 1972-09-12
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Expires: 1989-11-21
Abstract
Abstract PRODUCTION OF A MATTING OF MELT-SPUN SUBSTANTIALLY AMORPHOUS AND CONTINUOUS FILAMENTS BY DEPOSITING THE FRESHLY SPUN FILAMENTS ONTO THE SURFACE OF A COOLING BATH TO FORM OVERLAPPING SELF-ADHERING LOOPS IN AT LEAST THREE ROWS OR LAYERS, THE LOOPS BEING ORIENTED AT DIFFERENT ANGLES BY ADJUSTING THE WITHDRAWAL OF THE FILAMENTS IN A DIVERGING PATH THROUGH THE BATH, E.G. WITH THE USE OF A SUPPORTING GUIDE PLATE IN CONTACT WITH AN OUTERMOST ROW OF FILAMENTS. THE PRODUCT IS A LIGHTWEIGHT, COHERENT MATTING OF SELFBONDED, LOOPED FILAMENTS AND IS ESPECIALLY USEFUL IN CONSTRUCTING ARTIFICIAL SKI SLOPES AND AS A REINFORCEMENT FOR TRANSPORTABLE TURF.
Inventors
- 👤 Helmut Werner
- 👤 Hans Stapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:46
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; D04H3/02; D04H3/03; D04H3/037; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249922; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2938; Y10T442/00; Y10T442/60; Y10T442/68
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |