US4143225A
Expired / Lapsed
US
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Homopolymers of a fluorenone derivative having pendant electron acceptor groups
Assignee: Xerox Corp
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Filing: 1977-05-23
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Granted: 1979-03-06
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Expires: 1997-05-23
Abstract
Abstract Disclosed are monomers of the formula: ##STR1## WHEREIN R is ##STR2## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; and n is 1-10. These monomers can be readily polymerized to polymers suitable for use in electrophotographic imaging members and methods.
Inventors
- 👤 Sam R. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:21
CPC Classifications
C; C07; C07C; C07C205/00; C07C205/49; C07C205/57; C07C205/61; C07C65/00; C07C65/32; C07C65/34; C07C65/36; C07D; C07D203/00; C07D203/04; C07D203/06; C07D203/08; C07D203/10; C07D303/00; C07D303/02; C07D303/12; C07D303/16; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/12; C08F20/52; C08F20/54; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0609; G03G5/0618; G03G5/0622; G03G5/0624; G03G5/0625; G03G5/07; G03G5/071; G03G5/075; C07C2603/00; C07C2603/02; C07C2603/04; C07C2603/06; C07C2603/10; C07C2603/12; C07C2603/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
17 words
Homopolymers comprising the product of the addition polymerization of a monomer represented by the structural formula ##STR5##
Claim 2
Dependent Claim
17 words
Homopolymers comprising the product of the addition polymerization of a monomer represented by the structural formula ##STR5##
References Cited (Backward Citations)
US4011266A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-03-05 | 1982-09-04 | 1983-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-05 | 1986-09-04 | 1987-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-05 | 1990-09-04 | 1991-03-06 | $7700.00 | Window Closed / Lapsed |