Patent US4751327A successfully refreshed from Google Patents.
US4751327A
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Photoconductive imaging members with unsymmetrical squaraine compounds
Assignee: Xerox Corp
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Filing: 1986-10-02
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Granted: 1988-06-14
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Expires: 2006-10-02
Abstract
Abstract Disclosed are unsymmetrical squaraine compounds of the following formula ##STR1## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, aryl, heterocyclic, benzyl, and halobenzyl; and X 1 , X 2 and X 3 are independently selected from the group consisting of hydrogen, alkyl, halogen, carboxy, and hydroxy; and photoresponsive imaging members having incorporated therein the aforementioned squaraine compounds.
Inventors
- 👤 Peter M. Kazmaier
- 👤 Richard A. Burt
- 👤 Giuseppa Baranyi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:52
CPC Classifications
C; C07; C07D; C07D295/00; C07D295/04; C07D295/12; C07D295/125; C07D295/13; A; A61; A61P; A61P9/00; A61P9/06; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0609; G03G5/0611; G03G5/0618
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
82 words
Unsymmetrical squaraine compounds of the following formula ##STR11## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, aryl, heterocyclic, benzyl, and halobenzyl; X 2 is independently selected from the group consisting of hydrogen, alkyl, halogen, carboxy, and hydroxy; and X 1 and X 3 are independently selected from the group consisting of hydrogen, alkyl, halogen, and carboxy, subject to the provision that X 2 and X 3 represent different substituents.
Claim 2
Dependent Claim
82 words
Unsymmetrical squaraine compounds of the following formula ##STR11## wherein R 1 , R 2 , R 3 and R 4 are independently selected from the group consisting of alkyl, aryl, heterocyclic, benzyl, and halobenzyl; X 2 is independently selected from the group consisting of hydrogen, alkyl, halogen, carboxy, and hydroxy; and X 1 and X 3 are independently selected from the group consisting of hydrogen, alkyl, halogen, and carboxy, subject to the provision that X 2 and X 3 represent different substituents.
Claim 3
Dependent Claim
18 words
A squaraine compound in accordance with claim 1 wherein alkyl is from 1 to about 20 carbon atoms.
Claim 4
Dependent Claim
18 words
A squaraine compound in accordance with claim 1 wherein alkyl is from 1 to about 6 carbon atoms.
Claim 5
Dependent Claim
12 words
A squaraine compound in accordance with claim 1 wherein alkyl is methyl.
Claim 6
Dependent Claim
18 words
A squaraine compound in accordance with claim 1 wherein aryl is from 6 to about 24 carbon atoms.
Claim 7
Dependent Claim
12 words
A squaraine compound in accordance with claim 1 wherein aryl is phenyl.
Claim 8
Dependent Claim
13 words
A squaraine compound in accordance with claim 1 wherein the halobenzyl is fluorobenzyl.
Claim 9
Dependent Claim
30 words
A squaraine compound in accordance with claim 1 wherein the halogen for X 1 , X 2 and X 3 are selected from the group consisting of chloride and fluoride.
Claim 10
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
Claim 11
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
Claim 12
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 13
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 14
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (9-(8-hydroxyjulolidinyl)squaraine.
Claim 15
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylaminophenyl) (9-(8-hydroxyjulolidinyl)squaraine.
Claim 16
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-methylphenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
Claim 17
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-methylphenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
Claim 18
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-methylphenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 19
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-methylphenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 20
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-fluorophenyl) (4-methylamino-2-hydroxyphenyl)squaraine.
Claim 21
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-fluorophenyl) (4-methylamino-2-hydroxyphenyl)squaraine.
Claim 22
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-fluorophenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 23
Dependent Claim
6 words
The unsymmetrical squaraine compound (4-dimethylamino-2-fluorophenyl) (2,6-dihydroxy-4-dimethylaminophenyl)squaraine.
Claim 24
Dependent Claim
6 words
The unsymmetrical squaraine compound (2,6-dihydroxy-4-dimethylaminophenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
Claim 25
Dependent Claim
6 words
The unsymmetrical squaraine compound (2,6-dihydroxy-4-dimethylaminophenyl) (4-dimethylamino-2-hydroxyphenyl)squaraine.
References Cited (Backward Citations)
US4521621A
Cited
US4523035A
Cited
US4525592A
Cited
US4552822A
Cited
US4524218A
Cited
US4626485A
Cited
US4585895A
Cited
US4621038A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |