Patent US4242260A successfully refreshed from Google Patents.
US4242260A
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2-Hydroxy-3-carbonylanilinonaphth-1-yl disazo derivatives and 1-phenyl-3-methyl-5-hydroxypyrazol-4-yl disazo derivatives of 1,4-bis(4-aminostyryl) benzene
Assignee: Ricoh Co Ltd
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Filing: 1978-11-20
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Granted: 1980-12-30
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Expires: 1998-11-20
Abstract
Abstract The present invention provides disazo compounds expressed by the general formula I ##STR1## wherein A represents ##STR2## in which R represents alkyl radical, alkoxy radical, nitro radical, dialkylamino radical or halogen, n is 0 or an integer of 1, 2 or 3, and R may be either identical or different when n is an integer of 2 or 3. The disazo compounds are useful as photoconductive substances or charge-carrier generating substances in various kinds of electrophotographic elements.
Inventors
- 👤 Masaomi Sasaki
- 👤 Kiyoshi Sakai
- 👤 Mitsuru Hashimoto
- 👤 Masafumi Ohta
- 👤 Akio Kozima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:53
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; C09B35/039; C09B35/205; C09B35/215; C09B56/00; C09B56/04; C09B56/06
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
47 words
A disazo compound having the formula ##STR65## wherein A is ##STR66## and wherein R is alkyl, alkoxy, nitro, dialkylamino or halogen, n is 0 or an integer of 1, 2 or 3, and R may be either the same or different when n is 2 or 3.
Claim 2
Dependent Claim
47 words
A disazo compound having the formula ##STR65## wherein A is ##STR66## and wherein R is alkyl, alkoxy, nitro, dialkylamino or halogen, n is 0 or an integer of 1, 2 or 3, and R may be either the same or different when n is 2 or 3.
Claim 3
Dependent Claim
12 words
A compound as claimed in claim 1 in which A is ##STR67##
Claim 4
Dependent Claim
12 words
A compound as claimed in claim 2 in which "n" is 0.
Claim 5
Dependent Claim
12 words
A compound as claimed in claim 2 in which "n" is 1.
Claim 6
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is alkoxy.
Claim 7
Dependent Claim
14 words
A compound as claimed in claim 4 in which R is p--OCH 3 .
Claim 8
Dependent Claim
14 words
A compound as claimed in claim 4 in which R is o--OCH 3 .
Claim 9
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is alkyl.
Claim 10
Dependent Claim
14 words
A compound as claimed in claim 4 in which R is o--CH 3 .
Claim 11
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is halogen.
Claim 12
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is p--Cl.
Claim 13
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is dialkylamino.
Claim 14
Dependent Claim
16 words
A compound as claimed in claim 4 in which R is p--N(CH 3 ) 2 .
Claim 15
Dependent Claim
12 words
A compound as claimed in claim 4 in which R is nitro.
Claim 16
Dependent Claim
14 words
A compound as claimed in claim 4 in which R is m--NO 2 .
Claim 17
Dependent Claim
14 words
A compound as claimed in claim 4 in which R is p--NO 2 .
Claim 18
Dependent Claim
12 words
A compound as claimed in claim 2 in which "n" is 2.
Claim 19
Dependent Claim
12 words
A compound as claimed in claim 17 in which R is alkoxy.
Claim 20
Dependent Claim
12 words
A compound as claimed in claim 17 in which (R)n is 2,5-dimethoxy.
Claim 21
Dependent Claim
12 words
A compound as claimed in claim 17 in which R is alkyl.
Claim 22
Dependent Claim
12 words
A compound as claimed in claim 17 in which (R)n is 2,4-dimethyl.
Claim 23
Dependent Claim
12 words
A compound as claimed in claim 17 in which (R)n is 2-methyl-4-chloro.
Claim 24
Dependent Claim
12 words
A compound as claimed in claim 2 in which "n" is 3.
Claim 25
Dependent Claim
12 words
A compound as claimed in claim 23 in which (R)n is 2,5-dimethoxy-4-chloro.
Claim 26
Dependent Claim
12 words
A compound as claimed in claim 1 in which A is ##STR68##
Claim 27
Dependent Claim
12 words
A compound as claimed in claim 25 in which "n" is zero.
Claim 28
Dependent Claim
12 words
A compound as claimed in claim 25 in which "n" is 1.
Claim 29
Dependent Claim
14 words
A compound as claimed in claim 27 in which R is p--NO 2 .
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) | 1983-12-30 | 1984-06-30 | 1984-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-30 | 1988-06-30 | 1988-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-30 | 1992-06-30 | 1992-12-30 | $7700.00 | Window Closed / Lapsed |