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US3971795A
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Piperidine derivatives
Assignee: Novartis Corp
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Filing: 1973-07-17
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Granted: 1976-07-27
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Expires: 1993-07-17
Abstract
Abstract New piperidine derivatives and in particular esters and amides of substituted (piperidinylidene-4) acetic acid are used as stabilizers for polymers, especially for polyolefines.
Inventors
- 👤 Barry Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:23
CPC Classifications
C; C07; C07D; C07D221/00; C07D221/02; C07D221/20; C07D211/00; C07D211/04; C07D211/68; C07D211/70; C08; C08K; C08K5/00; C08K5/0008; C08K5/005; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435; C09; C09K; C09K15/00; C09K15/04; C09K15/30
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
A compound of the formula ##SPC18## wherein n is 1, 2, 3 or 4, Y is hydrogen or a straight- or branched alkyl residue having from 1 to 12 carbon atoms, an alkenyl residue having from 3 to 12 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms, R 1 and R 2 are the same or different and each is a straight- or branched alkyl residue having from 1 to 12 carbon atoms or R 1 and R 2 , together with the carbon atom to which they are attached, form a cycloalkyl group having from 5 to 12 carbon atoms, R 3 is hydrogen or a straight- or branched alkyl residue having from 1 to 4 carbon atoms, R 4 is a hydrocarbyl residue having from 1 to 20 carbon atoms, or, when n is 1, R 4 is, in addition, hydrogen or has the structure: ##SPC19## wherein Y, R 1 and R 2 are as defined above.
Claim 2
Dependent Claim
164 words
A compound of the formula ##SPC18## wherein n is 1, 2, 3 or 4, Y is hydrogen or a straight- or branched alkyl residue having from 1 to 12 carbon atoms, an alkenyl residue having from 3 to 12 carbon atoms or an aralkyl residue having from 7 to 12 carbon atoms, R 1 and R 2 are the same or different and each is a straight- or branched alkyl residue having from 1 to 12 carbon atoms or R 1 and R 2 , together with the carbon atom to which they are attached, form a cycloalkyl group having from 5 to 12 carbon atoms, R 3 is hydrogen or a straight- or branched alkyl residue having from 1 to 4 carbon atoms, R 4 is a hydrocarbyl residue having from 1 to 20 carbon atoms, or, when n is 1, R 4 is, in addition, hydrogen or has the structure: ##SPC19## wherein Y, R 1 and R 2 are as defined above.
Claim 3
Dependent Claim
33 words
A compound of claim 1 wherein R 1 and R 2 are alkyl groups, R 3 is hydrogen, R 4 is straight or branched aliphatic groups having from 1 to 20 carbon atoms.
Claim 4
Dependent Claim
12 words
A compound according to claim 1 wherein Y is hydrogen or methyl.
Claim 5
Dependent Claim
15 words
A compound according to claim 1 wherein R 1 and R 2 are each methyl.
Claim 6
Dependent Claim
19 words
A compound according to claim 1 wherein R 4 is an aliphatic residue having at least 6 carbon atoms.
Claim 7
Dependent Claim
53 words
A compound according to claim 1 wherein n is 1 and R 4 is hydrogen, a monovalent straight- or branched aliphatic residue either saturated or unsaturated having from 1 to 20 carbon atoms, an alicyclic residue having from 5 to 20 carbon atoms, an aryl residue having from 6 to 15 carbon atoms.
Claim 8
Dependent Claim
66 words
A compound according to claim 1 wherein n is 2 and R 4 is a divalent straight- or branched aliphatic residue, either saturated or unsaturated, having from 2 to 20 carbon atoms, a divalent alicyclic residue having from 5 to 20 carbon atoms, a divalent aralkyl residue having from 8 to 20 carbon atoms or a divalent aryl residue having from 6 to 20 carbon atoms.
Claim 9
Dependent Claim
9 words
A compound according to claim 1 which is ethyl-(2,2,6,6-tetramethyl-piperidinylidene-4)-acetate.
Claim 10
Dependent Claim
9 words
A compound according to claim 1 which is cyclohexyl-(2,2,6,6-tetramethyl-piperidinylidene-4)-acetate.
Claim 11
Dependent Claim
9 words
A compound according to claim 1 which is ethyl-(1,2,2,6,6-pentamethyl-piperidinylidene-4)-acetate.
Claim 12
Dependent Claim
11 words
A compound according to claim 1 which is (2,2,6,6-tetramethyl-piperidinylidene-4)-acetic acid hydrochloride.
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) | 1979-07-27 | 1980-01-26 | 1980-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-27 | 1984-01-26 | 1984-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-27 | 1988-01-26 | 1988-07-27 | $7700.00 | Window Closed / Lapsed |