US2734794A
Expired / Lapsed
US
⏱️ 0.0 years remaining
G cm-ton
Assignee: —
•
Filing: —
•
Granted: 1956-02-14
•
Expires: 1973-02-14
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 17:24
CPC Classifications
D; D02; D02G; D02G1/00; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
113 words
A PROCESS FOR PRODUCING UNIFORM ARTIFICIAL FIBERS HAVING THE RESILIENCE CHARACTERISTICS OF THE BETTER GRADES OF WOOL WHICH COMPRISES PREPARING POLYETHYLENE TEREPHTHALATE FIBERS OF TEXTILE DENIER EXHIBITING BIREFRINGENCE IN THE RANGE OF 0.004 TO 0.011 BY SPINNING 0.50 TO 0.70 INTRINSIC VISXOSITY POLYMER AT SPEEDS IN THE RANGE OF ABOUT 900 TO 1800 YARDS PER MINUTE, WETTING THE FIBERS WITH WATER, DRAWING THE WET FIBERS AT TEMPERATURES IN THE RANGE OF 35* TO 50 *C. TO A MAXIMUM DRAW RATIO OF 2.7 TO 4.1 TIMES, AND HEATING THE DRAWN FIBERS IN A FREE-TOSHRINK CONDITION AT TEMPERATURES IN THE RANGE OF 90* TO 200* C. UNTIL RELAXED AND SET AND CHARACTERIZED BY WOOLLIKE RESILIENCE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-13 | 1959-08-15 | 1960-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-13 | 1963-08-15 | 1964-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-13 | 1967-08-15 | 1968-02-14 | $7700.00 | Window Closed / Lapsed |