Patent US3969437A successfully refreshed from Google Patents.
US3969437A
Expired / Lapsed
US
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Cyclic phosphorus esters
Assignee: Stauffer Chemical Co
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Filing: 1971-02-23
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Granted: 1976-07-13
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Expires: 1991-02-23
Abstract
Abstract Novel cyclic phosphorus esters are disclosed having the formula: HOCH2CH2OOCH2R9 PARALLEL ANGLE N-CH2-P ANGLE ANGLE C ANGLE HOCH2CH2OCH2R10 where R9 and R10 can be the same or different and are selected from the group consisting of hydrogen, lower alkyl, lower hydroxyalkyl, lower haloalkyl and hydroxy with the proviso that no more than one of R9 and R10 can be hydroxy. These compounds are useful for the preparation of flame retardant textile finishes as well as for use as polyols for preparing flame retardant polyurethane foams.
Inventors
- 👤 Kyung Sup Shim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:27
CPC Classifications
D; D06; D06M; D06M13/00; D06M13/244; D06M13/282; D06M13/288; C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/38; C07F9/40; C07F9/4003; C07F9/4006; C07F9/547; C07F9/6564; C07F9/6571; C07F9/657163; C07F9/657181; Y; Y10; Y10T; Y10T442/00; Y10T442/20; Y10T442/2631; Y10T442/2672; Y10T442/2697
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
3 words
The compound: ##EQU16##
Claim 2
Dependent Claim
3 words
The compound: ##EQU16##
Claim 3
Dependent Claim
3 words
The compound: ##EQU17##
Claim 4
Dependent Claim
3 words
The compound: ##EQU17##
Claim 5
Dependent Claim
3 words
The compound: ##EQU18##
Claim 6
Dependent Claim
3 words
The compound: ##EQU18##
References Cited (Backward Citations)
US3134742A
Cited
US3597503A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-13 | 1980-01-12 | 1980-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-13 | 1984-01-12 | 1984-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-13 | 1988-01-12 | 1988-07-13 | $7700.00 | Window Closed / Lapsed |