Patent US3852947A successfully refreshed from Google Patents.
US3852947A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame retardant fiber blend
Assignee: Celanese Corp
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Filing: 1971-12-10
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Granted: 1974-12-10
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Expires: 1991-12-10
Abstract
Abstract There is provided a flame retardant fiber blend which is especially useful for children''s sleepwear. This blend is comprised of from about 10 to about 90 percent (by weight of blend) of polyester fiber and at least 10 percent (by weight of blend) of a flame-retardant acetate fiber which is comprised of from about 0.5 to about 25 percent (by weight of acetate fiber) of at least one tris(polyhaloaliphatic) phosphate.
Inventors
- 👤 M Mayer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:59
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/92; D01F1/00; D01F1/02; D01F1/07; Y; Y10; Y10S; Y10S57/00; Y10S57/904; Y10T; Y10T442/00; Y10T442/40; Y10T442/425; Y10T442/438
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
85 words
A FLAME-RETARDANT FIBER-BLEND COMPRISED OF AT LEAST 10 WEIGHT PERCENT (BY WEIGHT OF BLEND) OF FLAME-RETARDANT ACETATE FIBER AND FROM ABOUT 10 TO ABOUT 90 WEIGHT PERCENT BY WEIGHT OF BLEND) OF POLYESTER FIBERS, WHEREIN: A. SAID FLAME-RETARDANT ACETATE FIBER IS COMPRISED OF FROM ABOUT 0.5 TO ABOUT 25 WEIGHT PERCENT OF AT LEAST ONE TRIS(POLYHALOALIPHATIC) PHOSPHATE CONTAINING FROM ABOUT 3 TO ABOUT 24 CARBON ATOMS, AND B. SAID POLYESTER FIBER COMPRISES AT LEAST 90 WEIGHT PERCENT OF THE NON-FLAME-RETARDANT ACETATE FIBERS OF THE BLEND.
Claim 2
Dependent Claim
85 words
A FLAME-RETARDANT FIBER-BLEND COMPRISED OF AT LEAST 10 WEIGHT PERCENT (BY WEIGHT OF BLEND) OF FLAME-RETARDANT ACETATE FIBER AND FROM ABOUT 10 TO ABOUT 90 WEIGHT PERCENT BY WEIGHT OF BLEND) OF POLYESTER FIBERS, WHEREIN: A. SAID FLAME-RETARDANT ACETATE FIBER IS COMPRISED OF FROM ABOUT 0.5 TO ABOUT 25 WEIGHT PERCENT OF AT LEAST ONE TRIS(POLYHALOALIPHATIC) PHOSPHATE CONTAINING FROM ABOUT 3 TO ABOUT 24 CARBON ATOMS, AND B. SAID POLYESTER FIBER COMPRISES AT LEAST 90 WEIGHT PERCENT OF THE NON-FLAME-RETARDANT ACETATE FIBERS OF THE BLEND.
Claim 3
Dependent Claim
48 words
The fiber-blend of claim 1, wherein: a. said flame-retardant acetate is comprised of from about 3 to about 18 weight percent of said phosphate, b. said polyester is poly(ethylene terephthalate), and c. at least about 25 percent of said fiber blend is comprised of said flame-retardant acetate fiber.
Claim 4
Dependent Claim
27 words
The fiber-blend of claim 2, wherein said phosphate is tris(dibromopropyl) phosphate and said acetate fiber is comprised of up to about 10 weight percent of said phosphate.
Claim 5
Dependent Claim
29 words
The fiber-blend of claim 3, wherein said phosphate is tris (2,3-dibromopropyl) phosphate and said phosphate comprises from about 3.5 to about 7 weight percent of said flame-retardant acetate fiber.
Claim 6
Dependent Claim
27 words
The fiber-blend of claim 2, wherein said phosphate is tris(1-bromo-3-chloroisopropyl) phosphate and said acetate fiber is comprised of up to about 10 weight percent of said phosphate.
Claim 7
Dependent Claim
27 words
A doubleknit fabric of enhanced flame resistance comprising an effective proportion of at least 30 weight percent of yarn ends composed of the fiber-blend of claim 1.
Claim 8
Dependent Claim
62 words
The fabric of claim 6, wherein said yarn ends comprise a false twist textured continuous filament poly(ethylene terephthalate) yarn randomly intermingled with at least 10 weight percent (by weight of yarn ends) of a false twist textured, continuous filament, flame-retardant acetate yarn, said acetate yarn being comprised of from about 0.5 to about 25 weight percent of at least one tris(polyhaloaliphatic) phosphate.
Claim 9
Dependent Claim
15 words
The fabric of claim 7, wherein said false twist textured yarns are of opposite torque.
References Cited (Backward Citations)
US3732683A
Cited
US3744534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-09 | 1978-06-10 | 1978-12-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-09 | 1982-06-10 | 1982-12-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-09 | 1986-06-10 | 1986-12-10 | $7700.00 | Window Closed / Lapsed |