US3899491A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkyl alkanoate derivatives of substituted piperazines and polymer compositions stabilized thereby
Assignee: Novartis Corp
•
Filing: 1973-02-15
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Granted: 1975-08-12
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Expires: 1993-02-15
Abstract
Abstract Alkyl alkanoate derivatives of substituted piperazines are stabilizers for synthetic polymeric materials normally subject to deterioration caused by ultraviolet light. The compounds may be formed by reacting a substituted piperazine with an acrylate or reacting a substituted piperazine with an Alpha -haloalkanoate. Polymeric compositions containing these stabilizers may also contain a hindered phenolic compound. A typical embodiment is noctadecyl- Beta -(15( 7,15diazadispiro(5,1,5,3)hexadecane)propionate.
Inventors
- 👤 Chester E Ramey
- 👤 John J Luzzi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:29
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/02; C07D295/027; C07D295/04; C07D295/14; C07D295/145; C07D295/15; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3442; C08K5/3462
Claims Analysis
Total Claims: 16
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
9 words
A compound according to claim 1 having the formula
Claim 4
Dependent Claim
14 words
A compound according to claim 2, wherein R4 is hydrogen and m is 0.
Claim 5
Dependent Claim
31 words
A compound according to claim 1, wherein R1 and R2 are methyl; R3 is alkyl of from 1 to 20 carbon atoms; R4 is hydrogen and m is 0 or 1.
Claim 6
Dependent Claim
14 words
A compound according to claim 4, wherein R4 is hydrogen and m is 0.
Claim 7
Dependent Claim
13 words
A compound according to claim 1, which is methyl- Beta -(15( 7,15-diazadispiro(5,1,5,3)hexadecane)) propionate.
Claim 8
Dependent Claim
12 words
A compound according to claim 1, which is methyl- Beta -(4( 2,2,6,6-tetramethylpiperazino)propionate.
Claim 9
Dependent Claim
13 words
A compound according to claim 1, which is n-dodecyl- Beta -(15( 7,15-diazadispiro(5,1,5,3)hexadecane)) propionate.
Claim 10
Dependent Claim
13 words
A compound according to claim 1, which is n-octadecyl- Beta -(15( 7,15-diazadispiro(5,1,5,3)hexadecane)) propionate.
Claim 11
Dependent Claim
14 words
A compound according to claim 1, which is methyl- Beta -(15( 7,15-diazadispiro(5,1,5,3)hexadecane)) Alpha -methylpropionate.
Claim 12
Dependent Claim
11 words
A compound according to claim 1, which is methyl Alpha -(4-(2,2,6,6-tetramethylpiperazine))acetate.
Claim 13
Dependent Claim
11 words
A commpound according to claim 1, which is ethyl- Alpha -(4-(2,2,6,6-tetramethylpiperazino))propionate.
Claim 14
Dependent Claim
12 words
A compound according to claim 1, which is n-octadecyl- Alpha -(4-(2,2,6,6-tetramethylpiperazino)) acetate.
Claim 15
Dependent Claim
13 words
A compound according to claim 1, which is n-dodecyl- Alpha -(15( 7,15-diazadispiro(5,1,5,3)hexadecane)) propionate.
Claim 16
Dependent Claim
12 words
A compound according to claim 1, which is n-lauryl- Beta -(4( 2,2,6,6-tetramethylpiperazino))propionate.
References Cited (Backward Citations)
US3318876A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |