US2609569A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble multifilament yarn and process for making it
Assignee: Union Carbide Corp
•
Filing: 1948-11-12
•
Granted: 1952-09-09
•
Expires: 1968-11-12
Abstract
No abstract record available.
Inventors
- 👤 Walter Andrew Tainter
- 👤 Price Bernard Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
D; D01; D01F; D01F2/00; D01F2/24; D01F2/28
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
122 words
PROCESS FOR MAKING A HIGH MOLECULAR WEIGHT WATER-SOLUBLE MULTIFILAMENT YARN, WHICH COMPRISES FORMING AN AQUEOUS SPINNING SOLUTION OF A HIGH MOLECULAR WEIGHT WATER-SOLUTION OF WHICH ETHYL CELLULOSE, A 5% AQUEOUS SOLUTION OF WHICH HAS A VISOCITY AT 20% C. OF AT LEAST 1,000 CENTIPOISES, SAID SPINNING SOLUTION CONTAINING BETWEEN3% AND 30% OF SAID HYDROXYETHYL CELLULOSE, EXTRUDING SUCH SPINNING SOLUTION THROUGH A PLURALITY OF PASSAGES IN A SPINNERET AND INTO A LIQUID BATH OF A WATER-SOLUBLE COAGULANT FOR THE HYDROXYETHYL CELLULOSE, CONDUCTING THE COAGULATED FILAMENTS THUS PRODUCED THROUGH A BATH OF A WATER-SOLUBLE POLYHDRIC ALCOHOL WHILE GATHERING THE FILAMENTS TO FORM A YARN, STRETCHING THE YARN AT LEAST 50% WHILE PASSING THROUGH AT LEAST ONE OF SAID BATHS, AND THEN DRYING THE YARN.
References Cited (Backward Citations)
US1589606A
Cited
US2083252A
Cited
US1914172A
Cited
US2169757A
Cited
US2163723A
Cited
US2134895A
Cited
GB525038A
Cited
US2362761A
Cited
US2495767A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-09 | 1956-03-10 | 1956-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-09 | 1960-03-10 | 1960-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-09 | 1964-03-10 | 1964-09-09 | $7700.00 | Window Closed / Lapsed |