US5352834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic member
Assignee: Resonac Corp
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Filing: 1992-06-08
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Granted: 1994-10-04
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Expires: 2012-06-08
Abstract
Abstract Disclosed is an electrophotographic member containing as a charge transport material a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative which is remarkably excellent in solubility in an organic solvent and/or a binder such as polycarbonate resin, etc., can show very excellent electrophotographic properties such as high sensitivity, low residual potential and high durability. Further, a fluorine-containing N,N,N',N'-tetraarylbenzidine derivative usable as a charge transport material, and a process for producing the same are disclosed. Furthermore, a fluorine-containing diarylamine usable for producing the fluorine-containing N,N,N',N'-tetraarylbenzidine derivative, and a process for producing the same are disclosed.
Inventors
- 👤 Yoshii Morishita
- 👤 Yasushi Sugimoto
- 👤 Shigeru Hayashida
- 👤 Hiroko Ishikawa
- 👤 Yoshiaki Noda
- 👤 Shigeru Murakami
- 👤 Munehiro Sato
- 👤 Yoshinori Saito
- 👤 Naoji Kurata
- 👤 Yoshio Sugita
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:55
CPC Classifications
C; C07; C07C; C07C211/00; C07C211/43; C07C211/54; C07C211/56; C07C217/00; C07C217/78; C07C217/80; C07C217/82; C07C217/92; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
75 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative of the formula: ##STR92## wherein R 1 and R 2 are independently a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group, at least one of R 1 and R 2 is a fluoroalkyl group or a fluoroalkoxy group; and Ar 1 and Ar 2 are independently an aryl group which may have one or more substituents other than R 1 and R 2 .
Claim 2
Dependent Claim
75 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative of the formula: ##STR92## wherein R 1 and R 2 are independently a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group, at least one of R 1 and R 2 is a fluoroalkyl group or a fluoroalkoxy group; and Ar 1 and Ar 2 are independently an aryl group which may have one or more substituents other than R 1 and R 2 .
Claim 3
Dependent Claim
16 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR93##
Claim 4
Dependent Claim
35 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR94## wherein R 2 is a hydrogen atom, an alkyl group, an alkoxy group, fluoroalkyl group or a fluoroalkoxy group.
Claim 5
Dependent Claim
32 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR95## wherein Ar 2 is ##STR96## and R 2 is a hydrogen atom or an alkyl group.
Claim 6
Dependent Claim
51 words
A fluorine-containing N,N,N',N'-tetraarylbenzidine derivative according to claim 1, which is a compound of the formula: ##STR97## wherein R 1 is a fluoroalkyl group or a fluoroalkoxy group; Ar 2 is ##STR98## and R 2 is a hydrogen atom, an alkyl group, an alkoxy group, a fluoroalkyl group or a fluoroalkoxy group.
References Cited (Backward Citations)
US3935230A
Cited
US4933245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-10-03 | 1998-04-04 | 1998-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-03 | 2002-04-04 | 2002-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-03 | 2006-04-04 | 2006-10-04 | $7700.00 | Window Closed / Lapsed |