US4555567A
Expired / Lapsed
US
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2,6-Disazo anthraquinone compounds
Assignee: Ricoh Co Ltd
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Filing: 1983-09-30
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Granted: 1985-11-26
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Expires: 2003-09-30
Abstract
Abstract A disazo compound having the general formula (1) ##STR1## (wherein X represents a substituted or unsubstituted aromatic ring or hetero ring, and Ar represents a substituted or unsubstituted aromatic ring or hetero ring); a method of making said disazo compound which comprises using, as a starting material, couplers having the general formula (2) ##STR2## and the general formula (4) ##STR3## (wherein X and Ar are the same as defined above); and a multilayer type electrophotographic element using said disazo compound as a charge transfer substance.
Inventors
- 👤 Mitsuru Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:48
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0675; G03G5/0679; G03G5/0683; C; C09; C09B; C09B35/00; C09B35/02; C09B35/021; C09B35/033; C09B35/039
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
81 words
A disazo compound having the formula: ##STR352## wherein X is selected from the group consisting of benzo, naphtho, indolo, carbazolo, benzofurano and halogen-substituted derivatives thereof, and Ar is selected from the group consisting of phenyl, naphthyl, dibenzofuranyl, carbazolyl, and substituted derivatives thereof, wherein the substituent on said substituted derivative is one or more members selected from the group consisting of lower alkyl, lower alkoxy, halogen, trifluoromethyl, cyano, nitro, carboxyl, --COOR wherein R is lower alkyl, di(lower alkyl)amino and --SO 3 Na.
Claim 2
Dependent Claim
81 words
A disazo compound having the formula: ##STR352## wherein X is selected from the group consisting of benzo, naphtho, indolo, carbazolo, benzofurano and halogen-substituted derivatives thereof, and Ar is selected from the group consisting of phenyl, naphthyl, dibenzofuranyl, carbazolyl, and substituted derivatives thereof, wherein the substituent on said substituted derivative is one or more members selected from the group consisting of lower alkyl, lower alkoxy, halogen, trifluoromethyl, cyano, nitro, carboxyl, --COOR wherein R is lower alkyl, di(lower alkyl)amino and --SO 3 Na.
Claim 3
Dependent Claim
49 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo, halogen substituted benzo, naphtho, indolo, carbazolo or benzofurano, and Ar is unsubstituted phenyl, phenyl substituted with alkyl, alkoxy, halogen, trifluoromethyl, cyano, nitro, dialkylamino, carboxyl, --COOC 2 H 5 or --SO 3 Na, naphthyl, dibenzofuranyl or carbazolyl.
Claim 4
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is m-chlorophenyl.
Claim 5
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is p-chlorophenyl.
Claim 6
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is m-bromophenyl.
Claim 7
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is p-bromophenyl.
Claim 8
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is m-trifluoromethylphenyl.
Claim 9
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is p-trifluoromethylphenyl.
Claim 10
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is m-cyanophenyl.
Claim 11
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is p-cyanophenyl.
Claim 12
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is m-nitrophenyl.
Claim 13
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is p-nitrophenyl.
Claim 14
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is 2,5-dichlorophenyl.
Claim 15
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is 2-methyl-5-chlorophenyl.
Claim 16
Dependent Claim
17 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is 2-methyl-4-chlorophenyl.
Claim 17
Dependent Claim
10 words
A disazo compound as claimed in claim 1 wherein ##STR353##
Claim 18
Dependent Claim
32 words
A disazo compound as claimed in claim 1 wherein X is unsubstituted benzo and Ar is o-methoxyphenyl, m-methoxyphenyl, p-methoxyphenyl, o-methylphenyl, m-methylphenyl, p-methylphenyl, phenyl, o-chlorophenyl, o-bromophenyl, o-cyanophenyl, o-trifluoromethylphenyl, o-nitrophenyl, 2-nitro-4-methylphenyl, 2,5-dimethoxy-4-chlorophenyl or 2,4-dimethoxy-5-chlorophenyl.
Claim 19
Dependent Claim
10 words
A disazo compound as claimed in claim 1 wherein ##STR354##
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |