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US3932478A
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US
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Phosphonic acid half-esters and their derivatives
Assignee: Buckman Laboratories International Inc
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Filing: 1973-10-03
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Granted: 1976-01-13
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Expires: 1993-10-03
Abstract
Abstract Unsubstituted and substituted dialkyl esters of phosphoric and diphosphonic acids, nuclearly brominated derivatives thereof, and metal mono-, bis-, and tris- derivatives of phosphonic acid half-esters are useful as ultraviolet light absorbers and as fire retardants.
Inventors
- 👤 Joseph G. E. Fenyes
- 👤 Kenneth J. Flanagan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:13
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4056; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5317; C08K5/5333
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A compound having the formula ##EQU3## wherein R is a straight or branched chain unsubstituted or substituted alkyl group containing 1 to 18 carbon atoms wherein the substituent group is a halogen, R' is a metal selected from the group consisting of Al, Ni, Sn, and Zn, n is 2 or 3, and X is bromine or hydrogen.
Claim 2
Dependent Claim
58 words
A compound having the formula ##EQU3## wherein R is a straight or branched chain unsubstituted or substituted alkyl group containing 1 to 18 carbon atoms wherein the substituent group is a halogen, R' is a metal selected from the group consisting of Al, Ni, Sn, and Zn, n is 2 or 3, and X is bromine or hydrogen.
Claim 3
Dependent Claim
13 words
The compound of claim 1 wherein R' is tin and n is 2.
Claim 4
Dependent Claim
19 words
The compound of claim 1 wherein R is butyl, R' is tin, X is hydrogen, and n is 2.
Claim 5
Dependent Claim
13 words
The compound of claim 1 wherein R' is zinc and n is 2.
Claim 6
Dependent Claim
19 words
The compound of claim 1 wherein R is ethyl, R' is zinc, X is hydrogen and n is 2.
Claim 7
Dependent Claim
13 words
The compound of claim 1 wherein R' is nickel and n is 2.
Claim 8
Dependent Claim
19 words
The compound of claim 1 wherein R is isopropyl, R' is nickel, X is hydrogen, and n is 2.
Claim 9
Dependent Claim
13 words
The compound of claim 1 wherein R' is aluminum and n is 3.
Claim 10
Dependent Claim
19 words
The compound of claim 1 wherein R is ethyl, R' is aluminum, X is hydrogen, and n is 3.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |