US3796035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semi-continuous filament combination yarn
Assignee: Celanese Corp
•
Filing: 1972-03-28
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Granted: 1974-03-12
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Expires: 1992-03-28
Abstract
Abstract A method, apparatus and product comprising producing a semicontinuous filament yarn having staple yarn characteristics from crimped tow comprising longitudinally slitting a deregistered tow comprising different fibers into strips of filaments either with or without a tow spreading stage and subsequently twisting the strips into yarn. The tows differ from each other in the fibers they contain, but each individual tow may contain a relatively uniform blend of different fibers.
Inventors
- 👤 G Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:33
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/02; D02G3/06; D02G1/00; D02G1/18; D02J; D02J1/00; D02J1/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
52 words
A semi-continuous filament yarn comprising a plurality of at least two different deregistered crimped yarns of varying filament length ranging from staple length to continuous filament length wherein the different yarns have a differential shrinkage and have staple yarn bulk and fiber characteristics and yarn strengths approaching those of continuous filament yarn.
Claim 2
Dependent Claim
52 words
A semi-continuous filament yarn comprising a plurality of at least two different deregistered crimped yarns of varying filament length ranging from staple length to continuous filament length wherein the different yarns have a differential shrinkage and have staple yarn bulk and fiber characteristics and yarn strengths approaching those of continuous filament yarn.
Claim 3
Dependent Claim
16 words
The yarn of claim 1 having from about 3 to 30 projecting filament ends per inch.
Claim 4
Dependent Claim
12 words
The yarn of claim 1 having from about 100 to 10,000 filaments.
Claim 5
Dependent Claim
13 words
The yarn of claim 1 consisting essentially of cellulose acetate and polyester fibers.
Claim 6
Dependent Claim
13 words
The yarn of claim 1 consisting essentially of cellulose acetate and nylon fibers.
References Cited (Backward Citations)
US2262872A
Cited
US3367101A
Cited
US3077006A
Cited
US3156016A
Cited
US3398220A
Cited
US3578551A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |