US3874157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flame-retardant fiber blend
Assignee: FMC Corp
•
Filing: 1973-08-03
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Granted: 1975-04-01
•
Expires: 1993-08-03
Abstract
Abstract Flame-retardant yarns and fabrics of a combination of (1) fibers of a polyester resin of at least 75 mol percent of ethylene-2, 6naphthalene dicarboxylate units and at least 3 up to 25 mol percent of randomly copolymerized ester units having bromine or chlorine chemically united with the diol residue of said ester units and (2) flame-retardant cellulosic fibers.
Inventors
- 👤 William N Knopka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:00
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/667; D06M15/673; C; C08; C08G; C08G63/00; C08G63/02; C08G63/12; C08G63/16; C08G63/18; C08G63/181; C08G63/185; C08G63/187; C08G63/189; C08G63/68; C08G63/682; C08G63/6824; C08G63/6826; C08G63/688; C08G63/6884; C08G63/6886; C08G79/00; C08G79/02; C08G79/025; C08K; C08K5/00; C08K5/02; C08K5/03; C08L; C08L67/00; C08L67/02; C08L85/00; C08L85/02; D01; D01F; D01F1/00; D01F1/02; D01F1/07; D01F2/00; D01F2/24; D01F2/28; D01F6/00; D01F6/78; D01F6/84; D02; D02G; D02G3/00; D02G3/44; D02G3/443; D06M13/00; D06M13/08; D06M13/10; D06M13/184; D06M13/207; D06M13/21; D06M13/224; D06M13/232; D06M15/507; D06M15/53; Y; Y10; Y10S; Y10S57/00; Y10S57/904
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
112 words
FLAME-RETARDANT YARNS AND FABRICS OF A COMBINATION OF (1) FIBERS OF A LINEAR, RANDOM COPOLYESTER RESIN OF AT LEAST 75 MOL PERCENT OF ETHYLENE-2,6-NAPHTHALENE DICARBOXYLATE UNITS AND AT LEAST 3 MOL PERCENT UP TO 25 MOL PERCENT OF A COPOLYMERIZED ESTER UNIT HAVING BROMINE OR CHLORINE CHEMICALLY UNITED WITH THE DIOL RESIDUE OF SAID ESTER UNITS IN AN AMOUNT SUFFICIENT TO PROVIDE AT LEAST 3.5 PERCENT OF THE HALOGEN, BASED ON THE WEIGHT OF THE COPOLYESTER RESIN AND (2) FLAME-RETARDANT CELLULOSIC FIBERS, THE COPOLYESTER FIBERS BEING PRESENT IN AN AMOUNT OF FROM 10 TO 90 WEIGHT PERCENT AND THE CELLULOSIC FIBERS BEING PRESENT IN AN AMOUNT OF 90 TO 10 WEIGHT PERCENT.
Claim 2
Dependent Claim
112 words
FLAME-RETARDANT YARNS AND FABRICS OF A COMBINATION OF (1) FIBERS OF A LINEAR, RANDOM COPOLYESTER RESIN OF AT LEAST 75 MOL PERCENT OF ETHYLENE-2,6-NAPHTHALENE DICARBOXYLATE UNITS AND AT LEAST 3 MOL PERCENT UP TO 25 MOL PERCENT OF A COPOLYMERIZED ESTER UNIT HAVING BROMINE OR CHLORINE CHEMICALLY UNITED WITH THE DIOL RESIDUE OF SAID ESTER UNITS IN AN AMOUNT SUFFICIENT TO PROVIDE AT LEAST 3.5 PERCENT OF THE HALOGEN, BASED ON THE WEIGHT OF THE COPOLYESTER RESIN AND (2) FLAME-RETARDANT CELLULOSIC FIBERS, THE COPOLYESTER FIBERS BEING PRESENT IN AN AMOUNT OF FROM 10 TO 90 WEIGHT PERCENT AND THE CELLULOSIC FIBERS BEING PRESENT IN AN AMOUNT OF 90 TO 10 WEIGHT PERCENT.
Claim 3
Dependent Claim
18 words
The flame-retardant yarns and fabrics of claim 1 wherein the copolyester resin is represented by the general formula:
Claim 4
Dependent Claim
16 words
The flame-retardant yarns and fabrics of claim 2 wherein G is represented by the general formula:
Claim 5
Dependent Claim
14 words
The flame-retardant yarns and fabrics of claim 3 wherein X is bromine, Q is
Claim 6
Dependent Claim
19 words
The flame-retardant yarns and fabrics of claim 3 wherein X is bromine, Q is -SO2- and n is one.
Claim 7
Dependent Claim
15 words
The flame-retardant yarns and fabrics of claim 2 wherein G is represented by the formula:
Claim 8
Dependent Claim
16 words
The flame-retardant yarns and fabrics of claim 1 wherein the flame-retardant cellulosic fibers are regenerated cellulose.
Claim 9
Dependent Claim
25 words
The flame-retardant yarns and fabrics of claim 7 wherein the regenerated cellulose fibers contain a flame-retardant amount of a water-insoluble, liquid polymer of di-n-propyl phosphonitrilate.
Claim 10
Dependent Claim
17 words
The flame-retardant yarns and fabrics of claim 1 wherein the flame-retardant cellulosic fibers are cellulose acetate fibers.
Claim 11
Dependent Claim
19 words
The flame-retardant yarns and fabrics of claim 9 wherein the cellulose acetate fibers contain a flame-retardant amount of tris-(2,3-dibromopropyl)phosphate.
Claim 12
Dependent Claim
16 words
The flame-retardant yarns and fabrics of claim 1 wherein the flame-retardant cellulosic fibers are cotton fibers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |