US3907803A
Expired / Lapsed
US
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Hindered piperidine carboxamide acids and metal salts thereof
Assignee: Novartis Corp
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Filing: 1973-12-28
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Granted: 1975-09-23
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Expires: 1993-12-28
Abstract
Abstract Compounds having the formula WHEREIN R1 and R2 are lower alkyl or form a cycloalkyl ring, R3 is hydrogen, alkyl, Beta -methoxyethyl, alkenyl, propargyl, benzyl or alkyl substituted benzyl, R4 is alkylene, alkyl-thio-alkyl or alkyl-oxo-alkyl, M is hydrogen or a metal, and Z IS AN INTEGER OF FROM 1 TO 4, ARE GOOD STABILIZERS AGAINST ACTINIC RADIATION. These compounds are prepared, for example, from 4-amino-2,2,6,6tetramethylpiperidine and succinic anhydride to give N-(2,2,6,6tetramethylpiperidyl-4)succinamic acid. The metal salts of the acids are readily prepared by reacting the acids or their salts with a reactive form of the metal or metal complex.
Inventors
- 👤 Chester E Ramey
- 👤 John J Luzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:08
CPC Classifications
C; C09; C09K; C09K15/00; C09K15/04; C09K15/30; C07; C07D; C07D211/00; C07D211/04; C07D211/06; C07D211/36; C07D211/40; C07D211/44; C07D211/46; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 2
Dependent Claim
5 words
A COMPOUND OF THE FORMULA
Claim 3
Dependent Claim
73 words
A compound according to claim 1, wherein R1 and R2 are each methyl, R4 is straight-chain alkylene having 1 to 8 carbon atoms or the group -(CH2)mY(CH2)n-, wherein Y is oxygen or sulfur and m and n independently of each other are 1 or 2, M is hydrogen, nickel or manganese, and z has a value of 1 or 2, the value of z being the same as the available valence of M.
Claim 4
Dependent Claim
21 words
A compound according to claim 2, wherein R4 is straight-chain alkylene having 1 to 8 carbon atoms and M is hydrogen.
Claim 5
Dependent Claim
15 words
A compound according to claim 2, wherein R4 is the group -(CH2)mY(CH2)n-and M is hydrogen.
Claim 6
Dependent Claim
23 words
A compound according to claim 2, wherein R4 is straight-chain alkylene having 1 to 8 carbon atoms and M is nickel or manganese.
Claim 7
Dependent Claim
18 words
A compound according to claim 2, wherein R4 is the group -(CH2)mY(CH2)n- and M is nickel or manganese.
Claim 8
Dependent Claim
12 words
A compound according to claim 2, wherein M is hydrogen or nickel.
Claim 9
Dependent Claim
10 words
A compound according to claim 3, which is N-(2,2,6,6-tetramethylpiperidyl-4-)succinamic acid.
Claim 10
Dependent Claim
11 words
A compound according to claim 5, which is nickel bis(N-(2,2, 6,6-tetramethylpiperidyl-4-)succinamate).
References Cited (Backward Citations)
US3705166A
Cited
US3828052A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |