Patent US3944633A successfully refreshed from Google Patents.
US3944633A
Expired / Lapsed
US
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Phosphate esters
Assignee: FMC Corp
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Filing: 1974-10-31
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Granted: 1976-03-16
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Expires: 1994-10-31
Abstract
Abstract Flame-retardant polyester fibers containing 5 to 20% by weight of phosphate triester containing at least one mole of a hydroxymethyl bicyclic phosphate and 0-2 moles of a phenyl or naphthyl aryl compound as the sole flame-retardant additive or a two-component additive comprising the aforesaid triester in admixture with 20 to 80% of certain polychlorinated or polybrominated diaryl compounds.This is a division of application Ser. No. 422,841, filed Dec. 7, 1973, now U.S. Pat. No. 3,883,478.
Inventors
- 👤 John T. Gresham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 03:04
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/52; C08K5/527; C07; C07F; C07F9/00; C07F9/02; C07F9/547; C07F9/6564; C07F9/6571; C07F9/6574; C07F9/65748
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
80 words
A compound of the formula ##EQU3## where R is an aryl radical selected from the group consisting of phenyl and naphthyl radicals and phenyl and naphthyl radicals containing one to three chlorine or bromine atoms and substituted derivatives of said radicals, the substituents being selected from the group consisting of methyl, methoxy, phenyl, phenoxy and phenyl and phenoxy containing 1 to 5 chlorine or bromine atoms and y is a integer, 1 to 1, and x is 3 - y.
Claim 2
Dependent Claim
80 words
A compound of the formula ##EQU3## where R is an aryl radical selected from the group consisting of phenyl and naphthyl radicals and phenyl and naphthyl radicals containing one to three chlorine or bromine atoms and substituted derivatives of said radicals, the substituents being selected from the group consisting of methyl, methoxy, phenyl, phenoxy and phenyl and phenoxy containing 1 to 5 chlorine or bromine atoms and y is a integer, 1 to 1, and x is 3 - y.
Claim 3
Dependent Claim
26 words
The compound of claim 1 wherein R is selected from the group consisting of phenyl, naphthyl and phenyl and naphthyl containing one to three bromine atoms.
Claim 4
Dependent Claim
9 words
The compound of claim 2 wherein y is 1.
Claim 5
Dependent Claim
22 words
The compound of claim 3 wherein R is a member selected from the group consisting of 4-bromophenyl, 2,4-dibromophenyl, 1-bromo-2-naphthyl, 1,6-dibromo-2-naphthyl and 1,3,6-tribromo-2-naphthyl.
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) | 1979-03-16 | 1979-09-15 | 1980-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-16 | 1983-09-15 | 1984-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-16 | 1987-09-15 | 1988-03-16 | $7700.00 | Window Closed / Lapsed |