US3687759A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing resilient cushion
Assignee: Akzona Inc
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Filing: 1969-03-14
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Granted: 1972-08-29
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Expires: 1989-03-14
Abstract
Abstract THIS INVENTION RELATES TO A RESILIENT FILAMENTARY CUSHIONING UNIT OR PAD AND A PROCESS FOR ITS PRODUCTION WHEREIN A PLURALITY OF SUBSTANTIALLY AMORPHOUS THERMOPLASTIC FILAMENTS, E.G. FIBER-FORMING POLYAMIDE FILAMENTS, ARE MELTSPUN INTO A LIQUID COOLING BATH IN SUCH A MANNER THAT THEY LIE IN THE FORM OF PREDOMINATELY HELICAL TO SINUOUS LOOPS RANDOMLY BONDED AT THEIR POINTS OF INTERSECTION AS THE FILAMENTS ARE COMPLETELY SOLIDIFIED IN THE BATH. THE RESULTING LOOPED AND BONDED FILAMENTS FORM A COHESIVE RESILENT STRUCTURE WHICH IS USEFUL AS A SPRING CORE OR CUSHIONING UNIT.
Inventors
- 👤 Helmut Werner
- 👤 Hans Stapp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:32
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/08; D04H3/16; Y; Y10; Y10T; Y10T24/00; Y10T24/27; Y10T428/00; Y10T428/26; Y10T428/268; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2925; Y10T442/00; Y10T442/60; Y10T442/68
Claims Analysis
Total Claims: 0
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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) | 1975-08-29 | 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 |