US4839252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoreceptor
Assignee: Shindengen Electric Manufacturing Co Ltd
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Filing: 1988-02-26
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Granted: 1989-06-13
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Expires: 2008-02-26
Abstract
Abstract An electrophotographic photoreceptor having a photosensitive layer containing a butadiene compound represented by general formula ##STR1## wherein A 1 to A 4 are alkyl group, and a hydrazone compound represented by general formula ##STR2## wherein B 1 and B 2 are alkyl, phenyl, benzyl or methoxyphenyl groups, R 1 is hydrogen, alkyl, alkoxy or benzyloxy groups and R 2 is alkyl, phenyl or benzyl groups. The photoreceptor can suppress the photo-deterioration due to cyclic operation and is useful in the field of copying printers.
Inventors
- 👤 Tadaichi Murata
- 👤 Tsuneo Isomura
- 👤 Kenichi Fujimori
- 👤 Fuminori Tsuruta
- 👤 Kazuhito Dohi
- 👤 Masahiro Horigome
- 👤 Yoshitarou Nakayama
- 👤 Sachio Oomori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 18:16
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/0601; G03G5/0612; G03G5/0616
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
152 words
An electrophotographic photoreceptor comprising a support having thereon a photosensitive layer, in which said photosensitive layer contains a butadiene compound represented by general formula ##STR20## wherein A 1 -A 4 , which may be the same or different, are each an alkyl group, and a hydrazone compound represented by general formula ##STR21## wherein B 1 and B 2 , which may be the same or different, are each an alkyl group, a benzyl group or a methoxyphenyl group; R 1 is a hydrogen, an alkyl group or an O--R in which R is a linear or branched chain alkyl groups of 5 to 10 carbon atoms, an alkenyl group, an alkadienyl group or an aralkyl group of 7 to 10 carbon atoms; and R 2 is an alkyl group, a phenyl group, a p-methoxy benzyl group, an ethoxyphenyl group, a benzyl group, a methoxyphenyl group, a tolyl group and a naphthyl group.
Claim 2
Dependent Claim
152 words
An electrophotographic photoreceptor comprising a support having thereon a photosensitive layer, in which said photosensitive layer contains a butadiene compound represented by general formula ##STR20## wherein A 1 -A 4 , which may be the same or different, are each an alkyl group, and a hydrazone compound represented by general formula ##STR21## wherein B 1 and B 2 , which may be the same or different, are each an alkyl group, a benzyl group or a methoxyphenyl group; R 1 is a hydrogen, an alkyl group or an O--R in which R is a linear or branched chain alkyl groups of 5 to 10 carbon atoms, an alkenyl group, an alkadienyl group or an aralkyl group of 7 to 10 carbon atoms; and R 2 is an alkyl group, a phenyl group, a p-methoxy benzyl group, an ethoxyphenyl group, a benzyl group, a methoxyphenyl group, a tolyl group and a naphthyl group.
Claim 3
Dependent Claim
13 words
The electrophotographic photoreceptor according to claim 1, wherein the butadiene compound is 1,1-bis(p-diethylaminophenyl)-4,4-diphenyl-1,3-butadiene.
Claim 4
Dependent Claim
22 words
The electrophotographic photoreceptor according to claim 1, wherein the hydrazone compound is selected from a group consisting of p-dimethylaminobenzaldehyde-(diphenylhydrazone), o-methyl-dibenzylaminobenzaldehyde-(diphenylhydrazone) and o-benzyloxy-p-diethylaminobenzaldehyde-(diphenylhydrazone).
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-12 | 1992-12-12 | 1993-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-12 | 1996-12-12 | 1997-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-12 | 2000-12-12 | 2001-06-13 | $7700.00 | Window Closed / Lapsed |