US4450248A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hindered piperidyl light stabilizers
Assignee: Phoenix Chemical Corp
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Filing: 1981-08-14
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Granted: 1984-05-22
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Expires: 2001-08-14
Abstract
Abstract Piperidine-4-carboxylic acid derivatives of the formula ##STR1## wherein: R 2 is hydrogen, alkyl having from one to four carbon atoms, or oxyl; R 3 is --XR 5 or --CN; R 4 is alkylene having from two to twelve carbon atoms; cycloalkylene having from three to twelve carbon atoms; arylene having from six to twelve carbon atoms; or aralkylene having from seven to twelve carbon atoms; R 5 is hydrogen, alkyl having from one to twenty carbon atoms, cycloalkyl having from five to six carbon atoms; or alkenyl having from three to twenty carbon atoms; or ##STR2## X is --O-- or --NH--; and n is 0 to 10; and the acid addition salts thereof.
Inventors
- 👤 William E. Leistner
- 👤 Charles G. Overberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:48
CPC Classifications
C; C07; C07D; C07D211/00; C07D211/04; C07D211/68; C07D211/72; C07D211/78; C07D211/06; C07D211/36; C07D211/60; C07D211/62; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/3412; C08K5/3432; C08K5/3435
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
114 words
A piperidine-4-carboxylic acid derivative of the formula ##STR14## wherein: R 2 is hydrogen, alkyl having from one to four carbon atoms, or oxyl; R 3 is --XR 5 or --CN; R 4 is alkylene having from two to twelve carbon atoms; cycloalkylene having from three to twelve carbon atoms; arylene having from six to twelve carbon atoms; or aralkylene having from seven to twelve carbon atoms; R 5 is hydrogen, alkyl having from one to twenty carbon atoms, cycloalkyl having from five to six carbon atoms; or alkenyl having from three to twenty carbon atoms; or ##STR15## X is --O-- or --NH--; and n is 0 to 10; and the acid addition salts thereof.
Claim 2
Dependent Claim
114 words
A piperidine-4-carboxylic acid derivative of the formula ##STR14## wherein: R 2 is hydrogen, alkyl having from one to four carbon atoms, or oxyl; R 3 is --XR 5 or --CN; R 4 is alkylene having from two to twelve carbon atoms; cycloalkylene having from three to twelve carbon atoms; arylene having from six to twelve carbon atoms; or aralkylene having from seven to twelve carbon atoms; R 5 is hydrogen, alkyl having from one to twenty carbon atoms, cycloalkyl having from five to six carbon atoms; or alkenyl having from three to twenty carbon atoms; or ##STR15## X is --O-- or --NH--; and n is 0 to 10; and the acid addition salts thereof.
Claim 3
Dependent Claim
10 words
The derivative of claim 1, wherein R 3 is --CN.
Claim 4
Dependent Claim
25 words
The derivative of claim 2, wherein R 2 is hydrogen or alkyl, R 5 is hydrogen or alkyl, X is --O--, and n is 0.
Claim 5
Dependent Claim
10 words
The derivative of claim 3, wherein R 2 is hydrogen.
Claim 6
Dependent Claim
12 words
The derivative of claim 1, wherein R 3 is --XR 5 .
Claim 7
Dependent Claim
20 words
The derivative of claim 5, wherein R 2 is hydrogen or alkyl, and R 5 is hydrogen, alkyl or ##STR16##
Claim 8
Dependent Claim
9 words
The derivative of claim 6, wherein X is --O--.
Claim 9
Dependent Claim
6 words
Bis(2',2',6',6'-tetramethyl-4'-piperidyl)-2,2,6,6-tetramethyl-piperidine-3,4-di-carboxylate in accordance with claim 7.
Claim 10
Dependent Claim
6 words
##STR17## in accordance with claim 7.
Claim 11
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 1.
Claim 12
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 2.
Claim 13
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 3.
Claim 14
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 4.
Claim 15
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 5.
Claim 16
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 6.
Claim 17
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 7.
Claim 18
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 8.
Claim 19
Dependent Claim
17 words
A composition comprising a light degradable synthetic organic polymer and the piperidine-4-carboxylic acid derivative of claim 9.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-22 | 1987-11-21 | 1988-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-22 | 1991-11-21 | 1992-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-22 | 1995-11-21 | 1996-05-22 | $7700.00 | Window Closed / Lapsed |