US3903208A
Expired / Lapsed
US
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Phosphonous and thiophosphonous acid esters
Assignee: Sandoz AG
•
Filing: 1974-03-28
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Granted: 1975-09-02
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Expires: 1994-03-28
Abstract
Abstract Compounds useful as stabilisers for organic materials of the formula WHEREIN X is -CH2-, -O- or -S-, Y1 and Y2 are -O- or -S-, R1 and R2 are hydrocarbon radicals, and RINGS A and B may be substituted by alkyl groups, and inorganic salts of compounds in which either of R1 and R2 is hydrogen.
Inventors
- 👤 Kurt Hofer
- 👤 Guenther Tscheulin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:03
CPC Classifications
C; C07; C07F; C07F9/00; C07F9/02; C07F9/28; C07F9/48; C08; C08K; C08K5/00; C08K5/49; C08K5/51
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
4 words
A COMPOUND OF FORMULA
Claim 2
Dependent Claim
4 words
A COMPOUND OF FORMULA
Claim 3
Dependent Claim
10 words
A compound of claim 1, in which X signifies -O-.
Claim 4
Dependent Claim
13 words
A compound of claim 1, in which Y1 and Y2 are the same.
Claim 5
Dependent Claim
13 words
A compound of claim 1, in which R1 and R2 are the same.
Claim 6
Dependent Claim
18 words
A compound of claim 1, in which the P substituent is in the para position of the nucleus.
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
93 words
A compound of claim 1, in which R1 and R2 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
94 words
A compound of claim 1, in which R1 and R2 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
42 words
A compound of claim 1, in which R1 and R2 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
18 words
A compound of claim 1, in which R1 and R2 each signifies other than a tertiary alkyl radical.
Claim 12
Dependent Claim
18 words
A compound of claim 1, in which R1 and R2 each signifies n-butyl, n-dodecyl, 2,4-di-t-butyl-phenyl, 2-t-butylphenyl, or 2,4-di-t-butyldiphenyl.
Claim 13
Dependent Claim
28 words
A compound of claim 1, wherein X is oxygen, Y1 and Y2 are each oxygen and R1 and R2 are each alkyl of 1 to 8 carbon atoms.
Claim 14
Dependent Claim
8 words
The compound of claim 1, of the formula:
Claim 15
Dependent Claim
8 words
The compound of claim 1, of the formula
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) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |