Patent US6223183B1 successfully refreshed from Google Patents.
US3658910A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid 2-hydroxy-4-alkoxybenzophenones
Assignee: Carlisle Chemical Works Inc
•
Filing: 1970-02-11
•
Granted: 1972-04-25
•
Expires: 1990-02-11
Abstract
Abstract LIQUID 2-HYDROXY-4-ALKOXYBENZOPHENONES ARE PREPARED WHERE THE ALKOXY GROUP IS A MIXTURE OF RANDOM BRANCHED ALKYL GROUPS OF 6-10 CARBON ATOMS. THEY ARE USEFUL AS ULTRAVIOLET LIGHT STABILIZERS FOR POLYMERS, E.G. VINYL CHLORIDE POLYMERS AND MONOOLEFIN POLYMERS.
Inventors
- 👤 Ingenuin A Hechenbleikner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:02
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/04; C08K5/13; C08K5/132; C07; C07C; C07C45/00; C07C45/61; C07C45/67; C07C45/68; C07C45/70; C07C45/71; C07C49/00; C07C49/76; C07C49/84
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |