Surface modifying treatment of polyester fiber articles to impart soil-release properties thereto
Abstract
Abstract SURFACE MODIFIED POLYESTER FIBER ARTICLES WITH SOIL-RELEASE AND ANTI-REDEPSITION PROPERTIES ARE PREPARED FROM UNDRAWN OR DRAWN POLYESTER FIBERS BY WET TREATING THE POLYESTER FIBER TO PROVIDE A COATING THEREON OF COPOLYESTER COMPRISING ABOUT 20 TO 95 PERCENT BY WEIGHT OF POLYOXYALKYLENE UNITS AND THE REMAINDER BEING CRYSTALLIZABLE ESTER UNITS IDENTICAL TO THOSE PRESENT IN THE FIBERS AND, IF TREATING UNDRAWN FIBER, DRAWING THE TREATED FIBER; HEAT TREATING THE COATED DRAWN FIBER TO FIX THE COPOLYESTER TO THE FIBER SURFACE; WASHING THE FIBER TO REMOVE UNFIXED COPOLYESTER; AND DRYING THE FIBER, PREFERABLY BY REHEATING, PRIOR TO FURTHER PROCESSING, SUCH AS BY SPINNING WEAVING, KNITTING, AND THE LIKE, TO FORM OTHER FIBER ARTICLES OF THE INVENTION, WHICH FIBER ACTRICLES HAVE DURABLE SOIL-RELEASE AND ANTI-REDEPOSITION PROPERTIES.
Inventors
- 👤 Gazie K Ragep
- 👤 Wesley L Miller
Bibliographic Details
Claims Analysis
Total Claims: 0References 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) | 1974-06-07 | 1974-12-07 | 1975-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-07 | 1978-12-07 | 1979-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-07 | 1982-12-07 | 1983-06-08 | $7700.00 | Window Closed / Lapsed |