Patent US3931099A successfully refreshed from Google Patents.
US3931099A
Expired / Lapsed
US
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Fire retardant polyester fibers
Assignee: Monsanto Co
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Filing: 1972-11-24
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Granted: 1976-01-06
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Expires: 1992-11-24
Abstract
Abstract Fire retardant qualities are incorporated into polyester fibers by adding to the polymer, prior to spinning thereof into filaments, not more than about 20 percent, based on the weight of the polymer, of a compound having the general formula: ##SPC1## Where R is a radical selected from the group consisting of alkyl, aryl, and brominated aryl; where x + y equal 4-8, and where n is an integer of from 2-100.
Inventors
- 👤 Henry L. King
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:25
CPC Classifications
C; C08; C08L; C08L67/00; C08L67/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
82 words
A synthetic fiber in which the fiber-forming substance is any long chain synthetic polymer comprising at least 85% by weight of an ester of a dihydric alcohol and terephthalic acid and not more than about 20%, based on the weight of the polymer, of a compound having the general formula: ##SPC3## where R is a radical selected from the group consisting of alkyl, aryl, and brominated aryl; where x + y equal 4-8, and where n is an integer of from 2-100.
Claim 2
Dependent Claim
82 words
A synthetic fiber in which the fiber-forming substance is any long chain synthetic polymer comprising at least 85% by weight of an ester of a dihydric alcohol and terephthalic acid and not more than about 20%, based on the weight of the polymer, of a compound having the general formula: ##SPC3## where R is a radical selected from the group consisting of alkyl, aryl, and brominated aryl; where x + y equal 4-8, and where n is an integer of from 2-100.
Claim 3
Dependent Claim
19 words
The fiber of claim 1 wherein said compound is present in the polymer in the amount of about 10-20%.
Claim 4
Dependent Claim
10 words
The fiber of claim 1 wherein n is about 3-10.
Claim 5
Dependent Claim
10 words
The fiber of claim 1 wherein n is about 3.
Claim 6
Dependent Claim
13 words
The fiber of claim 1 wherein the compound is poly(tetrabromo dipheno phenyl phosphonate).
Claim 7
Dependent Claim
16 words
The fiber of claim 5 wherein said compound is present in the amount of about 15%.
Claim 8
Dependent Claim
11 words
The fiber of claim 1 wherein said ester is polyethylene terephthalate.
References Cited (Backward Citations)
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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) | 1979-01-05 | 1979-07-07 | 1980-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-05 | 1983-07-07 | 1984-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-05 | 1987-07-07 | 1988-01-06 | $7700.00 | Window Closed / Lapsed |