Patent US3898840A successfully refreshed from Google Patents.
US4028330A
Expired / Lapsed
US
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Fire retardant polyester fibers
Assignee: Monsanto Co
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Filing: 1971-05-26
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Granted: 1977-06-07
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Expires: 1991-05-26
Abstract
Abstract Fire retardant qualitites are incorporated into polyester fibers by adding to the polymer, prior to spinning thereof into filaments, not more than about 25 percent, based on the weight of the polymer, of a compound having the general formula: ##STR1## WHERE R is a radical selected from the group consisting of alkyl, aromatic and brominated aromatic; x = 2-4; and n = 1-100.
Inventors
- 👤 Henry L. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333; C08K5/5337; C08L; C08L67/00; C08L67/02; C08L85/00; C08L85/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
75 words
A synthetic fiber in which the fiber-forming substance is any long chain synthetic polymer comprised of at least 85% by weight of an ester of a dihydric alcohol and terephthalic acid containing not more than about 20%, based on the weight of the polymer, of a compound having the general formula: ##STR3## where R is a radical selected from the group consisting of alkyl, aromatic, and brominated aromatic; x = 2-4; and n = 1-100.
Claim 2
Dependent Claim
75 words
A synthetic fiber in which the fiber-forming substance is any long chain synthetic polymer comprised of at least 85% by weight of an ester of a dihydric alcohol and terephthalic acid containing not more than about 20%, based on the weight of the polymer, of a compound having the general formula: ##STR3## where R is a radical selected from the group consisting of alkyl, aromatic, and brominated aromatic; x = 2-4; and n = 1-100.
Claim 3
Dependent Claim
16 words
The fiber of claim 1 wherein said fiber contains said compound in the amount of 10-20%.
Claim 4
Dependent Claim
11 words
The fiber of claim 1 wherein said ester is ethylene terephthalate.
Claim 5
Dependent Claim
10 words
The fiber of claim 1 wherein n is about 3.
Claim 6
Dependent Claim
14 words
The fiber of claim 1 wherein said compound is poly(di bromo pheno phenyl phosphonate).
Claim 7
Dependent Claim
16 words
The fiber of claim 5 wherein said compound is present in the amount of about 15%.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |