US3987086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered hydroxyphenylalkanoates of substituted vicinal glycols
Assignee: Novartis Corp
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Filing: 1974-12-12
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Granted: 1976-10-19
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Expires: 1994-12-12
Abstract
Abstract The compounds are esters having the formula ##EQU1## wherein R 1 is alkyl, cycloalkyl, alkylthioethyl or alkylpolyoxyalkylene, Z is oxygen or sulfur, R 2 is the group ##SPC1## R 3 is hydrogen, alkyl, cycloalkyl, or α-methylbenzyl, R 4 is alkyl or cycloalkyl, R 5 is hydrogen or alkyl, provided when R 3 is hydrogen, R 5 is alkyl and R 4 is located on the carbon atom ortho to the hydroxyl group, and A is a covalent carbon bond or lower alkylene.
Inventors
- 👤 Martin Dexter
- 👤 David Herbert Steinberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:29
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C323/00; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08K5/04; C08K5/13; C08K5/134; C08K5/1345; C08K5/36; C08K5/37; C09; C09K; C09K15/00; C09K15/04; C09K15/06; C10M2207/00; C10M2207/28; C10M2207/281; C10M2207/282; C10M2207/283; C10M2207/286; C10M2207/287; C10M2207/289; C10M2207/34; C10M2219/00; C10M2219/08; C10M2219/082; C10M2219/084; C10M2221/00; C10M2221/04; C10M2221/043; C10N; C10N2040/00; C10N2040/20; C10N2040/22; C10N2040/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
62 words
A compound having the formula ##EQU2## wherein R 1 is alkyl of 8 to 18 carbon atoms, Z is oxygen or sulfur, R 2 is the group ##SPC11## R 3 is alkyl of 1 to 4 carbon atoms, R 4 is branched alkyl of 3 to 8 carbon atoms, and A is a straight chain alkylene of 1 to 3 carbon atoms.
Claim 2
Dependent Claim
62 words
A compound having the formula ##EQU2## wherein R 1 is alkyl of 8 to 18 carbon atoms, Z is oxygen or sulfur, R 2 is the group ##SPC11## R 3 is alkyl of 1 to 4 carbon atoms, R 4 is branched alkyl of 3 to 8 carbon atoms, and A is a straight chain alkylene of 1 to 3 carbon atoms.
Claim 3
Dependent Claim
28 words
A compound according to claim 1 wherein R 1 is alkyl of 8 to 18 carbon atoms, Z is oxygen or sulfur, R 2 is the group ##SPC12##
Claim 4
Dependent Claim
9 words
The compound according to claim 1 which is 1-n-octadecyloxy-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy)
Claim 5
Dependent Claim
9 words
The compound according to claim 1 which is 1-n-dodecylthio-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy)p
Claim 6
Dependent Claim
9 words
The compound according to claim 1 which is 1-n-octadecylthio-2,3-bis(3-methyl-5-tert-butyl-4-hydroxyhydrocinnamoyloxy
Claim 7
Dependent Claim
9 words
The compound according to claim 1 which is 1-n-octadecylthio-2,3-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)pro
Claim 8
Dependent Claim
9 words
The compound according to claim 1 which is 1-n-octadecyloxy-2,3-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyloxy)propane.
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) | 1979-10-19 | 1980-04-19 | 1980-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-19 | 1984-04-19 | 1984-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-19 | 1988-04-19 | 1988-10-19 | $7700.00 | Window Closed / Lapsed |