US4504419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-cyanocinnamate ultraviolet-absorbing stabilizers substituted by an aliphatic hydroxyl group
Assignee: Novartis Corp
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Filing: 1982-09-30
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Granted: 1985-03-12
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Expires: 2002-09-30
Abstract
Abstract Alpha-cyanocinnamate ultraviolet-absorbing stabilizers of the formula ##STR1## where T is alkyl of 4 to 14 carbon atoms, and R 4 is alkyl of 1 to 4 carbon atoms, are particularly resistant to loss during weathering of outdoor thermoset or thermoplastic coating systems while exhibiting good stabilization efficacy and compatibility in said systems.
Inventors
- 👤 Martin Dexter
- 👤 Roland A. E. Winter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:11
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/16; C08K5/20; C08K5/04; C08K5/10; C08K5/11; C08K5/315; C08K5/34; C08K5/3467; C08K5/3472; C08K5/3475; C09; C09D; C09D7/00; C09D7/40; C09D7/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
26 words
A compound having the formula where T is alkyl of 4 to 14 carbon atoms, and R 4 is alkyl of 1 to 4 carbon atoms.
Claim 2
Dependent Claim
26 words
A compound having the formula where T is alkyl of 4 to 14 carbon atoms, and R 4 is alkyl of 1 to 4 carbon atoms.
Claim 3
Dependent Claim
19 words
A compound according to claim 1 selected from the group consisting of (a) ethyl 4-(3-n-octyloxy-2-hydroxypropoxy)-α-cyanocinnamate; and (b) ethyl 4-(3-n-dodecyloxy-2-hydroxypropoxy)α-cyanocinnamate.
References Cited (Backward Citations)
US3256312A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-11 | 1988-09-10 | 1989-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-11 | 1992-09-10 | 1993-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-11 | 1996-09-10 | 1997-03-12 | $7700.00 | Window Closed / Lapsed |