US3962313A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cycloaliphatic alkylhydroxyphenylalkanoates
Assignee: Individual
•
Filing: 1974-12-16
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Granted: 1976-06-08
•
Expires: 1994-12-16
Abstract
Abstract Alkylhydroxyphenylalkanoic acid esters of mono- and polyhydric alicyclic alcohols, prepared by known esterification or transesterification procedures, are stabilizers of organic material subject to oxidative deterioration.
Inventors
- 👤 Martin Dexter
- 👤 David H. Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:51
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C09K15/08
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
33 words
An ester of a monohydric alicyclic alcohol, the ester having the formula ##EQU6## wherein x is 0 or 1, and cycloalkane represents a monovalent cycloalkyl radical having from 4 to 12 carbon atoms.
Claim 2
Dependent Claim
33 words
An ester of a monohydric alicyclic alcohol, the ester having the formula ##EQU6## wherein x is 0 or 1, and cycloalkane represents a monovalent cycloalkyl radical having from 4 to 12 carbon atoms.
Claim 3
Dependent Claim
13 words
An ester according to claim 1, wherein each (lower) alkyl group is tert.butyl.
Claim 4
Dependent Claim
17 words
An ester according to claim 1, wherein the cycloalkyl radical has from 5 to 7 carbon atoms.
Claim 5
Dependent Claim
46 words
An ester of a dihydric alicyclic alcohol, the ester having the formula ##EQU7## wherein x is 0 or 1, and cycloalkane represents a divalent cycloalkyl radical having from 4 to 12 carbon atoms, the two valence bonds of said cycloalkyl radical being on adjacent carbon atoms.
Claim 6
Dependent Claim
46 words
An ester of a dihydric alicyclic alcohol, the ester having the formula ##EQU7## wherein x is 0 or 1, and cycloalkane represents a divalent cycloalkyl radical having from 4 to 12 carbon atoms, the two valence bonds of said cycloalkyl radical being on adjacent carbon atoms.
Claim 7
Dependent Claim
12 words
An ester according to claim 4, wherein each (lower)alkyl group is tert.butyl.
Claim 8
Dependent Claim
11 words
An ester according to claim 5, wherein the compound is 1,2-bis-{3-(3,5-di-t-butyl-4-hydroxyphenyl)proppionyloxy}-cyclododecane.
Claim 9
Dependent Claim
76 words
An ester of partially hydroxylated polyhydric alicyclic alcohol, the ester having the formula ##EQU8## wherein x is 0 or 1, y has a value from 2 to 4, and cycloalkane represents a di- to tetravalent cycloalkyl radical having from 4 to 12 carbon atoms, the two to four valence bonds of said cycloalkyl radical being on adjacent or non-adjacent carbon atoms, provided that when y is 4 the cycloalkyl radical does not have 4 carbon atoms.
Claim 10
Dependent Claim
76 words
An ester of partially hydroxylated polyhydric alicyclic alcohol, the ester having the formula ##EQU8## wherein x is 0 or 1, y has a value from 2 to 4, and cycloalkane represents a di- to tetravalent cycloalkyl radical having from 4 to 12 carbon atoms, the two to four valence bonds of said cycloalkyl radical being on adjacent or non-adjacent carbon atoms, provided that when y is 4 the cycloalkyl radical does not have 4 carbon atoms.
Claim 11
Dependent Claim
12 words
An ester according to claim 7, wherein each (lower)alkyl group is tert.butyl.
Claim 12
Dependent Claim
11 words
An ester according to claim 8, wherein the compound is 1,3-bis-{3-(3,5-di-t-butyl-4-hydroxyphenyl)proppionyloxy}-2,2,4,4-tetramethylcyclobutane.
Claim 13
Dependent Claim
11 words
An ester according to claim 8, wherein the compound is 1,3,5-tris-{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxy}-2,2,4,4,6,6-hexamethylcyclohexane.
Claim 14
Dependent Claim
11 words
An ester according to claim 8, wherein the compound is 1,4-bis-{3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyloxymethyl}-cyclohexane
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) | 1979-06-08 | 1979-12-08 | 1980-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-08 | 1983-12-08 | 1984-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-08 | 1987-12-08 | 1988-06-08 | $7700.00 | Window Closed / Lapsed |