US2926065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of shrinkproofing oriented, crystallized polyethylene terephthalate yarns at elevated temperatures by heat tensioning and heat relaxing said yarns
Assignee: FABRIC RES LAB Inc
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Filing: 1956-04-18
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Granted: 1960-02-23
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Expires: 1976-04-18
Abstract
No abstract record available.
Inventors
- 👤 Myron J Coplan
- 👤 Robert J Coskren
- 👤 Thomas T Constantine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:32
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10S; Y10S8/00; Y10S8/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
147 words
THE METHOD OF TREATING YARNS COMPRISING ORIENTED AND CRYSTALLIZED POLYETHYLENE TEREPHTHALATE MATERIAL TO INCREASE THEIR TENACITY AND REDUCE THEIR CAPACITY TO SHRINK IN USE AT ELEVATED TEMPERATURES, WHICH CONSISTS ESSENTIALLY OF HEATING SAID YARN UNDER CHEMICALLY NON-REACTIVE CONDITIONS TO A TEMPERATURE IN EXCESS OF ABOUT 340*F. AND BELOW ITS MELTING POINT WHILE MAINTAINING THE YARN UNDER A TENSION FROM THAT WHICH IS AT LEAST SUFFICIENT TO PREVENT SUBSTANTIAL SHRINKAGE OF THE SAME TO THAT WHICH IS SUFFICIENT TO STRETCH IT LESS THAN 50% OF ITS UNHEATED LENGTH, AND THEREAFTER RELIEVILNG SAID YARN OF SUBSTANTIALLY ALL TENSION AND HEATING THE UNTENSIONED YARN UNDER CHEMCIALLY NON-REACTIVE CONDITIONS TO AN ELEVATED TEMPERATURE ABOVE ABOUT 340* F. AND BELOW ABOUT 450* F. AND PERMITTING IT WHILE SO HEATED TO SHRINK FREELY WITHOUT SUBSTANTIAL RESTRAINT, WHEREBY THE YARN IS SUBSTIANTIALLY SHRINKPROOF WHEN THEREAFTER DURING USE IT IS HEATED TO SAID ELEVATED TEMPERATURE.
Claim 2
Independent Claim
147 words
THE METHOD OF TREATING YARNS COMPRISING ORIENTED AND CRYSTALLIZED POLYETHYLENE TEREPHTHALATE MATERIAL TO INCREASE THEIR TENACITY AND REDUCE THEIR CAPACITY TO SHRINK IN USE AT ELEVATED TEMPERATURES, WHICH CONSISTS ESSENTIALLY OF HEATING SAID YARN UNDER CHEMICALLY NON-REACTIVE CONDITIONS TO A TEMPERATURE IN EXCESS OF ABOUT 340*F. AND BELOW ITS MELTING POINT WHILE MAINTAINING THE YARN UNDER A TENSION FROM THAT WHICH IS AT LEAST SUFFICIENT TO PREVENT SUBSTANTIAL SHRINKAGE OF THE SAME TO THAT WHICH IS SUFFICIENT TO STRETCH IT LESS THAN 50% OF ITS UNHEATED LENGTH, AND THEREAFTER RELIEVILNG SAID YARN OF SUBSTANTIALLY ALL TENSION AND HEATING THE UNTENSIONED YARN UNDER CHEMCIALLY NON-REACTIVE CONDITIONS TO AN ELEVATED TEMPERATURE ABOVE ABOUT 340* F. AND BELOW ABOUT 450* F. AND PERMITTING IT WHILE SO HEATED TO SHRINK FREELY WITHOUT SUBSTANTIAL RESTRAINT, WHEREBY THE YARN IS SUBSTIANTIALLY SHRINKPROOF WHEN THEREAFTER DURING USE IT IS HEATED TO SAID ELEVATED TEMPERATURE.
References Cited (Backward Citations)
US2615784A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |