US3875264A
Expired / Lapsed
US
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Phosphonous acid esters
Assignee: Sandoz AG
•
Filing: 1972-11-21
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Granted: 1975-04-01
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Expires: 1992-11-21
Abstract
Abstract Compounds, useful as stablizers for organic materials, of the formula WHEREIN X is -CH2-, -O- or -S-, Y1, Y2, Y3 and Y4 are -O- or -S-, R1, R2, R3 and R4 are hydrocarbon radicals, rings A and B may be substituted by alkyl groups, AND INORGANIC SALTS OF COMPOUNDS IN WHICH ANY OF R1-R4 are hydrogen.
Inventors
- 👤 Kurt Hofer
- 👤 Guenther Tscheulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:37
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C07F9/4808; C07F9/4841; C08; C08K; C08K5/00; C08K5/49; C08K5/51; C08K5/53; C08K5/5393; C08K5/5398; C09; C09K; C09K15/00; C09K15/04; C09K15/32; C09K15/322; C09K15/324
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
10 words
A compound of claim 1, in which X signifies -O-.
Claim 4
Dependent Claim
15 words
A compound of claim 1, in which Y1, Y2, Y3 and Y4 are the same.
Claim 5
Dependent Claim
15 words
A compound of claim 1, in which R1, R2, R3 and R4 are the same.
Claim 6
Dependent Claim
8 words
A compound of claim 1, in which the
Claim 7
Dependent Claim
15 words
A compound of claim 1, in which rings A and B are each further unsubstituted.
Claim 8
Dependent Claim
95 words
A compound of claim 1, in which R1, R2, R3 and R4 each signifies an alkyl radical of 1 to 12 carbon atoms, a cycloalkyl radical of 3 to 12 carbon atoms, which may be substituted by 1, 2 or 3 alkyl groups of 1 to 4 carbon atoms, a cycloalkylalkyl radical in which the cycloalkyl portion contains 5 to 12 carbon atoms and the alkyl portion 1 to 6 carbon atoms, or a phenyl or diphenyl radical which may be substituted by 1, 2 or 3 alkyl radicals of 1 to 12 carbon atoms.
Claim 9
Dependent Claim
96 words
A compound of claim 1, in which R1, R2, R3 and R4 each signifies an alkyl radical of 1 to 6 carbon atoms, a cycloalkyl radical of 5 to 8 carbon atoms, which may be substituted by 1, 2 or 3 alkyl groups of 1 to 4 carbon atoms, a cycloalkylalkyl radical in which the cycloalkyl portion contains 5 to 8 carbon atoms and the alkyl portion contains 1 to 4 carbon atoms, or a phenyl or diphenyl radical which may be substituted by 1, 2 or 3 alkyl radicals of 1 to 6 carbon atoms.
Claim 10
Dependent Claim
44 words
A compound of claim 1, in which R1, R2, R3 and R4 each signifies an alkyl radical of 4 to 12 carbon atoms, or phenyl or diphenyl radical, which may be substituted by 1 or 2 alkyl radicals of 1 to 4 carbon atoms.
Claim 11
Dependent Claim
20 words
A compound of claim 1, in which R1, R2, R3 and R4 each signifies other then a tertiary alkyl radical.
Claim 12
Dependent Claim
20 words
A compound of claim 1, in which R1, R2, R3 and R4 each signiFies n-butyl, n-dodecyl, 2,4-di-t-butylphenyl, 2-t-butylphenyl, or 2,4-di-t-butyldiphenyl.
Claim 13
Dependent Claim
15 words
A compound of claim 2 in which Y1, Y2, Y3, and Y4 are the same.
Claim 14
Dependent Claim
14 words
A compound of claim 2 wherein R1, R2, R3, and R4 are the same.
Claim 15
Dependent Claim
14 words
A compound of claim 3 wherein R1, R2, R3, and R4 are the same.
Claim 16
Dependent Claim
15 words
A compound of claim 12 in which R1, R2, R3, and R4 are the same.
Claim 17
Dependent Claim
7 words
The compound of claim 1 of formula
Claim 18
Dependent Claim
7 words
The compound of claim 1 of formula
Claim 19
Dependent Claim
7 words
The compound of claim 1 of formula
Claim 20
Dependent Claim
7 words
The compound of claim 1 of formula
References Cited (Backward Citations)
US3707565A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-31 | 1978-09-30 | 1979-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-31 | 1982-09-30 | 1983-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-31 | 1986-09-30 | 1987-04-01 | $7700.00 | Window Closed / Lapsed |