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Patent US4415640A successfully refreshed from Google Patents.
US4415640A
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Electrophotographic element with fluorenylidene hydrazone compounds
Assignee: Konica Minolta Inc
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Filing: 1982-02-18
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Granted: 1983-11-15
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Expires: 2002-02-18
Abstract
Abstract Electrophotographic light-sensitive elements containing substituted or unsubstituted fluorenone hydrazones as charge generating or charge transport materials are described.
Inventors
- 👤 Satoshi Goto
- 👤 Kiyoshi Sawada
- 👤 Osamu Sasaki
- 👤 Akira Kinoshita
- 👤 Yoshiaki Takei
- 👤 Yoshihide Fujimaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:18
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
115 words
An electrophotographic light-sensitive element comprising a conductive support having thereon a light-sensitive layer comprising at least one hydrazone compound having the following formula: ##STR5## wherein R 1 is selected from the group consisting of an aryl group and a substituted aryl group; R 2 is selected from the group consisting of a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and X and Y are each selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, a substituted alkyl group, an alkoxy group, a substituted alkoxy group, an amino group, a substituted amino group, a nitro group and a cyano group.
Claim 2
Dependent Claim
115 words
An electrophotographic light-sensitive element comprising a conductive support having thereon a light-sensitive layer comprising at least one hydrazone compound having the following formula: ##STR5## wherein R 1 is selected from the group consisting of an aryl group and a substituted aryl group; R 2 is selected from the group consisting of a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group and a substituted aryl group; and X and Y are each selected from the group consisting of a hydrogen atom, a halogen atom, an alkyl group, a substituted alkyl group, an alkoxy group, a substituted alkoxy group, an amino group, a substituted amino group, a nitro group and a cyano group.
Claim 3
Dependent Claim
18 words
An electrophotographic light-sensitive element according to claim 1, wherein said alkyl group has 1 to 8 carbon atoms.
Claim 4
Dependent Claim
19 words
An electro photographic light-sensitive element according to claim 2, wherein said alkyl group has 1 to 4 carbon atoms.
Claim 5
Dependent Claim
18 words
An electrophotographic light-sensitive element according to claim 1, wherein said alkoxy group has 1 to 8 carbon atoms
Claim 6
Dependent Claim
18 words
An electrophotographic light-sensitive element according to claim 4, wherein said alkoxy group has 1 to 4 carbon atoms.
Claim 7
Dependent Claim
17 words
An electrophotographic light-sensitive element according to claim 1, wherein said substituted alkyl group is a benzyl group.
Claim 8
Dependent Claim
26 words
An electrophotographic light-sensitive element according to claim 1, wherein said aryl group is selected from the group consisting of a phenyl group and a naphthyl group.
Claim 9
Dependent Claim
20 words
An electrophotographic light-sensitive element according to claim 1, wherein said light-sensitive layer further comprises at least one carrier generating material.
Claim 10
Dependent Claim
31 words
An electrophotographic light-sensitive element according to claim 8, wherein said light-sensitive layer comprises two layers, a first layer containing said carrier generating material and a second layer containing said hydrazone compound.
Claim 11
Dependent Claim
17 words
An electrophotographic light-sensitive element according to claim 1, wherein said light-sensitive layer further comprises a binder material.
Claim 12
Dependent Claim
87 words
An electrophotographic light-sensitive element according to claim 1, wherein R 1 is selected from the group consisting of a phenyl group and a naphthyl group; R 2 is selected from the group consisting of a hydrogen atom, a benzyl group, a phenyl group and a naphthyl group; and X and Y are each selected from the group consisting of a hydrogen atom, a halogen atom, a benzyl group, an alkoxy group having 1 to 4 carbon atoms, an amino group, a nitro group and a cyano group.
Claim 13
Dependent Claim
20 words
An electrophotographic light-sensitive element according to claim 11, wherein said light-sensitive layer further comprises at least one carrier generating material.
Claim 14
Dependent Claim
31 words
An electrophotographic light-sensitive element according to claim 12, wherein said light-sensitive layer comprises two layers, a first layer containing said carrier generating material and a second layer containing said hydrazone compound.
Claim 15
Dependent Claim
17 words
An electrophotographic light-sensitive element according to claim 11, wherein said light-sensitive layer further comprises a binder material.
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) | 1986-11-14 | 1987-05-16 | 1987-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-14 | 1991-05-16 | 1991-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-14 | 1995-05-16 | 1995-11-15 | $7700.00 | Window Closed / Lapsed |