US3180913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing high shrinkage fibers
Assignee: Monsanto Co
•
Filing: 1962-03-19
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Granted: 1965-04-27
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Expires: 1982-03-19
Abstract
No abstract record available.
Inventors
- 👤 John D Veitch
- 👤 Byrd T Thompson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:54
CPC Classifications
D; D01; D01G; D01G1/00; D01G1/06; D01G1/10; D01D; D01D5/00; D01D5/22; D01F; D01F6/00; D01F6/02; D01F6/18; D01F6/28; D01F6/38; D01F6/44; D01F6/54; Y; Y10; Y10S; Y10S264/00; Y10S264/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A METHOD FOR PRODUCING HIGH SHRINKAGE ACRYLIC FIBERS COMPOSED OF AT LEAST 80 PERCENT ACRYLONITRILE AND UP TO 20 PERCENT OF ANOTHER COPOLYMRIZABLE MONO-OLDFINIC MONOMER COMPRISING SUBJECTING SIAD FIBERS IN THE FRESHLY SPUN STATE TO A FIRST LOW RATIO STRETCH IN THE RANGE OF 1.5 TO 2.5 IN BOILING WATER, SUBJECTING SAID STRETCHED FIBERS TO STEAM UNDER PRESSURE IN A RANGE OF 35 P.S.I.G. TO 55 P.S.I.G., THEN SUBJECTING SAID FIBERS TO A SECOND LOW RATIO STRETCH IN THE RANGE OF 1.7 TO 3.0 IN A HOT WATER BATH AT A TEMPERATURE OF BETWEEN 70*C., AND 95*C., THEN COOLING SAID FIBERS UNDER TENSION AND THEN DRYING SAID FIBERS AT A TEMPERATURE OF BELOW 70*C.
Claim 2
Independent Claim
114 words
A METHOD FOR PRODUCING HIGH SHRINKAGE ACRYLIC FIBERS COMPOSED OF AT LEAST 80 PERCENT ACRYLONITRILE AND UP TO 20 PERCENT OF ANOTHER COPOLYMRIZABLE MONO-OLDFINIC MONOMER COMPRISING SUBJECTING SIAD FIBERS IN THE FRESHLY SPUN STATE TO A FIRST LOW RATIO STRETCH IN THE RANGE OF 1.5 TO 2.5 IN BOILING WATER, SUBJECTING SAID STRETCHED FIBERS TO STEAM UNDER PRESSURE IN A RANGE OF 35 P.S.I.G. TO 55 P.S.I.G., THEN SUBJECTING SAID FIBERS TO A SECOND LOW RATIO STRETCH IN THE RANGE OF 1.7 TO 3.0 IN A HOT WATER BATH AT A TEMPERATURE OF BETWEEN 70*C., AND 95*C., THEN COOLING SAID FIBERS UNDER TENSION AND THEN DRYING SAID FIBERS AT A TEMPERATURE OF BELOW 70*C.
References Cited (Backward Citations)
US2681265A
Cited
US3099517A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |