US3155754A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing oriented synthetic linear polyester fibers and films having a sheath-core structure
Assignee: EIDP Inc
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Filing: 1962-04-11
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Granted: 1964-11-03
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Expires: 1982-04-11
Abstract
No abstract record available.
Inventors
- 👤 Dustin S Adams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:09
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/22; D02J1/223; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
77 words
IN THE PRODUCTION OF ORIENTED SYNTHETIC LINEAR TEREPHTHALATE POLYESTER FIBER STRUCTURES BY EXTRUDING A SOLVENTFREE MELT OF THE POLYESTER TO FORM FIBERS AND SOLIDIFYING THE FIBERS TO AN UNORIENTED STRUCTURE, AND DRAWING THE SOLID FIBERS TO ORIENT THE STRUCTURE, THE IMPROVEMENT FOR MODIFYING THE SURFACE TO PROVIDE A DISTINCT SHEATH-CORE STRUCTURE WHICH COMPRISES CONTACTING THE DRY UNORIENTED FIBERS WITH A LIQUID SEMISOLVENT FOR THE POLYESTER FOR A PERIOD OF 0.2 SECOND TO ABOUT 3.0 SECONDS WITH IMMEDIATE
Claim 2
Dependent Claim
77 words
IN THE PRODUCTION OF ORIENTED SYNTHETIC LINEAR TEREPHTHALATE POLYESTER FIBER STRUCTURES BY EXTRUDING A SOLVENTFREE MELT OF THE POLYESTER TO FORM FIBERS AND SOLIDIFYING THE FIBERS TO AN UNORIENTED STRUCTURE, AND DRAWING THE SOLID FIBERS TO ORIENT THE STRUCTURE, THE IMPROVEMENT FOR MODIFYING THE SURFACE TO PROVIDE A DISTINCT SHEATH-CORE STRUCTURE WHICH COMPRISES CONTACTING THE DRY UNORIENTED FIBERS WITH A LIQUID SEMISOLVENT FOR THE POLYESTER FOR A PERIOD OF 0.2 SECOND TO ABOUT 3.0 SECONDS WITH IMMEDIATE
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) | 1967-11-03 | 1968-05-04 | 1968-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-03 | 1972-05-04 | 1972-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-03 | 1976-05-04 | 1976-11-03 | $7700.00 | Window Closed / Lapsed |