USRE31002E
Expired / Lapsed
US
⏱️ 0.0 years remaining
N-(3-Hydroxyaryl-propyl)-imides
Assignee: Novartis Corp
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Filing: 1978-05-10
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Granted: 1982-07-27
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Expires: 1998-05-10
Abstract
Abstract The new N-[3-(3-hydroxyaryl)-2-hydroxypropyl]-imides may be prepared by reacting 3-(3-hydroxyaryl)-propenoxides with cyclic imides. These hydroxy compounds as well as their esters with carboxylic acids are highly effective in the stabilization of polymers, preferably of polyolefins, against thermal-oxydative attack. The compounds themselves exhibit a good stability against discoloration by radiation or gas fading.
Inventors
- 👤 Hanns Lind
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:44
CPC Classifications
C; C07; C07D; C07D207/00; C07D207/02; C07D207/30; C07D207/34; C07D207/36; C07D207/40; C07D207/404; C06; C06B; C06B45/00; C06B45/02; C06B45/04; C07D209/00; C07D209/02; C07D209/44; C07D209/48; C07D233/00; C07D233/54; C07D233/66; C07D233/72; C08; C08K; C08K5/00; C08K5/16; C08K5/34; F; F42; F42B; F42B5/00; F42B5/02; F42B5/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
in the phenyl radical..]. .[.2. A compound according to claim 1, wherein R 1 and R 2 independently of one another are an alkyl group of 1 to 8 carbon atoms, R 3 is hydrogen, R 4 is hydrogen or a ##STR36## group, R 5 is an alkyl group of 1 to 17 carbon atoms, a cyclohexyl group, a phenyl group, a phenyl group substituted by halogen, hydroxyl groups, alkyl groups of 1 to 4 carbon atoms or alkoxy groups of 1 to 18 carbon atoms, or a benzyl or phenethyl group substituted in a phenyl radical by one or two alkyl groups of 1 to 4 carbon atoms, a hydroxyl group or one or two alkyl groups of 1 to 4 carbon atoms and a hydroxyl
Claim 2
Dependent Claim
56 words
group..]. .[.3. A compound according to claim 1, wherein R 1 and R 2 independently of one another are an alkyl group of 1 to 4 carbon atoms, R 3 is hydrogen, R 4 is hydrogen or a ##STR37## group, and R 5 is an alkyl group of 1 to 17 carbon atoms or a ##STR38##
Claim 3
Dependent Claim
27 words
group..]. .[.4. A compound according to claim 1, wherein R 1 and R 2 independently of one another are an alkyl group of 1 to 4 carbon
Claim 4
Dependent Claim
25 words
atoms and R 3 and R 4 are hydrogen..]. 5. The compound .[.according to claim 1.]. of the formula ##STR39## wherein R represents the ##STR40##
Claim 5
Dependent Claim
15 words
The compound .[.according to claim 1.]. of the formula ##STR41## wherein R' represents the ##STR42##
Claim 6
Dependent Claim
53 words
.Iadd.7. A compound of the formula .Iaddend. ##STR43## .Iadd. wherein each R is .Iaddend. ##STR44## .Iadd.in which each of R 1 and R 2 is alkyl of 1 to 8 carbon atoms and R 4 is hydrogen or .Iaddend. ##STR45## .Iadd.in which R 5 is alkyl of 1 to 17 carbon atoms or
Claim 7
Dependent Claim
33 words
2-(3,5-di-t-butyl-4-hydroxyphenyl)ethyl. .Iaddend. .Iadd. 8. A compound according to claim 7 wherein R 1 is methyl, isopropyl or t-butyl; R 2 is isopropyl or t-butyl; and R 4 is hydrogen, acetyl or 3-(3,5-di-t-butyl-4-hydroxyphenyl)propionyl. .Iaddend.
References Cited (Backward Citations)
US3531483A
Cited
US3669962A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-26 | 1986-01-25 | 1986-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-26 | 1990-01-25 | 1990-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-26 | 1994-01-25 | 1994-07-27 | $7700.00 | Window Closed / Lapsed |