US3439085A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of non-woven elastic polyurethane fabric
Assignee: Carl Freudenberg KG
•
Filing: 1964-10-21
•
Granted: 1969-04-15
•
Expires: 1984-10-21
Abstract
No abstract record available.
Inventors
- 👤 Ludwig Hartmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:27
CPC Classifications
D; D04; D04H; D04H3/00; D04H3/005; D04H3/009; D04H3/08; D04H3/16; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/601; Y10T442/68; Y10T442/69
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
108 words
PROCESS FOR THE PRODUCTION OF NON-WOVEN ELASTIC FABRIC, WHICH COMPRISES FUSING A CROSS-LINKABLE POLYURETHANE MASS; METL-SPINNING SAID FUSED MASS INTO A MULTIPLICITY OF SUBSTANTIALLY ENDLESS FILAMENTS; AIR-DRAWING SAID SUBSTANTIALLY ENDLESS FILAMENTS WHILE MAINTAINING SAID FILAMENTS IN A HOT AND TACKY STATE, WHEREBY THE MOLECULES OF SAID FILAMENTS ARE ORIENTED IN THE DIRECTION OF THE AXIS OF SAID FILAMENTS; LAYING SAID HOT, TACKY ORIENTED SUBSTANTIALLY ENDLESS FILAMETNS ON A SUPPORTING SURFACE; CROSS-LINKING SAID SUBSTANTIALLY ENDLESS FILAMENTS BY MEANS OF MOISTURE IN SAID AIR; AND WELDING SAID SUBSTANTIALLY ENDLESS POLYURETHANE FILAMENTS TO OTHER SUCH FILAMENTS BY MEANS OF ITS TACKINESS, WHEREIN SAID FILAMENTS BECOME SOLID AND NON-TACKY AFTER SAID WELDING.
Claim 2
Dependent Claim
108 words
PROCESS FOR THE PRODUCTION OF NON-WOVEN ELASTIC FABRIC, WHICH COMPRISES FUSING A CROSS-LINKABLE POLYURETHANE MASS; METL-SPINNING SAID FUSED MASS INTO A MULTIPLICITY OF SUBSTANTIALLY ENDLESS FILAMENTS; AIR-DRAWING SAID SUBSTANTIALLY ENDLESS FILAMENTS WHILE MAINTAINING SAID FILAMENTS IN A HOT AND TACKY STATE, WHEREBY THE MOLECULES OF SAID FILAMENTS ARE ORIENTED IN THE DIRECTION OF THE AXIS OF SAID FILAMENTS; LAYING SAID HOT, TACKY ORIENTED SUBSTANTIALLY ENDLESS FILAMETNS ON A SUPPORTING SURFACE; CROSS-LINKING SAID SUBSTANTIALLY ENDLESS FILAMENTS BY MEANS OF MOISTURE IN SAID AIR; AND WELDING SAID SUBSTANTIALLY ENDLESS POLYURETHANE FILAMENTS TO OTHER SUCH FILAMENTS BY MEANS OF ITS TACKINESS, WHEREIN SAID FILAMENTS BECOME SOLID AND NON-TACKY AFTER SAID WELDING.
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) | 1972-04-14 | 1972-10-14 | 1973-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-14 | 1976-10-14 | 1977-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-14 | 1980-10-14 | 1981-04-15 | $7700.00 | Window Closed / Lapsed |