Patent US3644485A successfully refreshed from Google Patents.
US3644485A
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2-hydroxy-4-(2 - hydroxyethoxy) benzophenone esters and their use as stabilizers
Assignee: Eastman Kodak Co
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Filing: 1969-04-14
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Granted: 1972-02-22
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Expires: 1989-04-14
Abstract
Abstract COMPOSITIONS OF MATTER OF THE STRUCTURE ((3-(HO-),4-(PHENYL-CO-)PHENYL)-O-CH2-CH2-OOC)N-X WHEREIN N=2,3, OR 4 X=POLYVALENT ORGANIC RADICAL DERIVED FROM AN ALIPHATIC, CYCLOALIPHATIC OR AROMAIC POLYBASIC ACID AND THEIR USE AS STABILIZERS FOR VARIOUS POLYMERIC MATERIALS.
Inventors
- 👤 Gerald R Lappin
- 👤 Wayne V Mcconnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:50
CPC Classifications
C; C07; C07C; C07C69/00; C07C69/76; C07C323/00; C07C69/34; C07C69/40; C07C69/44; C07C69/52; C07C69/593; C07C69/60; C07C69/74; C07C69/75; C07C69/80; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/101; C08K5/105; C08K5/107; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-02-21 | 1975-08-23 | 1976-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-21 | 1979-08-23 | 1980-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-21 | 1983-08-23 | 1984-02-22 | $7700.00 | Window Closed / Lapsed |