US4110334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of 1-oxa-3,8-diaza-spiro-[4,5]-decanes
Assignee: Hoechst AG
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Filing: 1977-02-09
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Granted: 1978-08-29
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Expires: 1997-02-09
Abstract
Abstract Derivatives of 1-oxa-3,8-diaza-spiro-[4,5]-decane, which be prepared by reacting a 2,2-dimethyl-6,6-dialkyl-4-hydroxy-4-carbamoylpiperidine with an aldehyde or ketone, are excellently suitable as light stabilizers for organic materials.
Inventors
- 👤 Norbert Mayer
- 👤 Gerhard Pfahler
- 👤 Hartmut Wiezer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:06
CPC Classifications
C; C07; C07D; C07D498/00; C07D498/02; C07D498/10; C07D498/12; C07D498/20; C08; C08K; C08K5/00; C08K5/16; C08K5/34; C08K5/35
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
85 words
A compound of the formula ##STR9## wherein R 3 and R 4 each are identical or different substituents selected from the group consisting of hydrogen, alkyl- or isoalkyl of from 1-30 carbons, aryl of 6 or 10 carbons, unsubstituted or substituted by halogen or alkyl of 1-4 carbons, phenylalkyl of 7-10 carbons, or R 3 and R 4 are, together with the attached carbon, cycloalkyl of 4-15 carbons, unsubstituted or substituted by C 1 - C 4 alkyl, or a group of the formula ##STR10##
Claim 2
Dependent Claim
85 words
A compound of the formula ##STR9## wherein R 3 and R 4 each are identical or different substituents selected from the group consisting of hydrogen, alkyl- or isoalkyl of from 1-30 carbons, aryl of 6 or 10 carbons, unsubstituted or substituted by halogen or alkyl of 1-4 carbons, phenylalkyl of 7-10 carbons, or R 3 and R 4 are, together with the attached carbon, cycloalkyl of 4-15 carbons, unsubstituted or substituted by C 1 - C 4 alkyl, or a group of the formula ##STR10##
Claim 3
Dependent Claim
27 words
A compound of claim 1, wherein R 3 is hydrogen, R 4 is isopropyl, butyl, isobutyl, pentyl, isopentyl, hexyl, heptyl, isoheptyl, nonyl, isononyl, undecyl, phenyl or p-chlorophenyl.
Claim 4
Dependent Claim
23 words
A compound of claim 1, wherein R 3 is methyl and R 4 is ethyl, propyl, isopropyl, butyl, isobutyl, pentyl, hexyl, or nonyl.
Claim 5
Dependent Claim
15 words
A compound of claim 1, wherein R 3 is ethyl and R 4 is n-pentyl.
Claim 6
Dependent Claim
21 words
A compound of claim 1, wherein R 3 and R 4 are identical and are methyl, ethyl, propyl, butyl or benzyl.
Claim 7
Dependent Claim
30 words
A compound of claim 1, wherein R 3 and R 4 are, together with the attached carbon, a cyclopentyl, cyclohexyl or cyclododecyl ring or a group of the formula ##STR11##
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |