Patent USRE28698E successfully refreshed from Google Patents.
USRE28698E
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic material containing sensitizers
Assignee: Panasonic Holdings Corp
•
Filing: 1974-08-07
•
Granted: 1976-01-27
•
Expires: 1994-08-07
Abstract
Abstract An electrophotographic material is provided herein which comprises a conductive support layer and a photoconductive insulating layer, the latter layer comprising a photoconductive polymeric compound such as poly-N-vinylcarbazole, and a sensitizer having the following general formula ##SPC1## Wherein B represents a radical selected from the group consisting of ##SPC2## ##SPC3## Compounds falling under the latter general formula include such compounds as 2-phenyl-4-[(2'-phenyl-4'-benzopyranylidene) benzyl]-benzopyrylium perchlorate and 2,3-phenyl-4-[(2'-phenyl 4'-benzopyranylidene)benzyl]-6-methylbenzopyrylium perchlorate.
Inventors
- 👤 Yoshinobu Murakami
- 👤 Yo Hasegawa
- 👤 Kazuhisa Morimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:09
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/0674; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
35 words
An electrophotographic material comprising a conductive support layer and photoconductive insulating layer, the latter comprising a combination of a photoconductive polymeric compound and a sensitizing amount of a sensitizer having the following formula: ##SPC17## wherein
Claim 2
Dependent Claim
35 words
An electrophotographic material comprising a conductive support layer and photoconductive insulating layer, the latter comprising a combination of a photoconductive polymeric compound and a sensitizing amount of a sensitizer having the following formula: ##SPC17## wherein
Claim 3
Dependent Claim
12 words
B represents a radical selected from the group consisting of ##SPC18## ##SPC19##
Claim 4
Dependent Claim
12 words
B represents a radical selected from the group consisting of ##SPC18## ##SPC19##
Claim 5
Dependent Claim
24 words
R 1 is hydrogen, phenyl or an ethenyl radical selected from the group consisting of styryl, p-methoxystyryl, 3,4-dimethoxy-styryl, α-phenylstyryl, α-phenyl-p-methoxystyryl, β-furyl(α')ethenyl and α-phenyl-β-furyl(α') ethenyl;
Claim 6
Dependent Claim
24 words
R 1 is hydrogen, phenyl or an ethenyl radical selected from the group consisting of styryl, p-methoxystyryl, 3,4-dimethoxy-styryl, α-phenylstyryl, α-phenyl-p-methoxystyryl, β-furyl(α')ethenyl and α-phenyl-β-furyl(α') ethenyl;
Claim 7
Dependent Claim
6 words
R 2 is hydrogen or phenyl;
Claim 8
Dependent Claim
6 words
R 2 is hydrogen or phenyl;
Claim 9
Dependent Claim
7 words
R 3 is hydrogen, methyl or phenyl;
Claim 10
Dependent Claim
7 words
R 3 is hydrogen, methyl or phenyl;
Claim 11
Dependent Claim
6 words
R 4 is hydrogen or phenyl;
Claim 12
Dependent Claim
6 words
R 4 is hydrogen or phenyl;
Claim 13
Dependent Claim
22 words
R 5 is hydrogen, phenyl or an ethenyl radical selected from the group consisting of styryl, p-methoxystyryl, 3,4-dimethoxy-styryl, α-phenyl-p-methoxystyryl, β-furyl(α')ethenyl and α-phenyl-β-furyl(α')ethenyl;
Claim 14
Dependent Claim
22 words
R 5 is hydrogen, phenyl or an ethenyl radical selected from the group consisting of styryl, p-methoxystyryl, 3,4-dimethoxy-styryl, α-phenyl-p-methoxystyryl, β-furyl(α')ethenyl and α-phenyl-β-furyl(α')ethenyl;
Claim 15
Dependent Claim
6 words
R 6 is hydrogen or phenyl;
Claim 16
Dependent Claim
6 words
R 6 is hydrogen or phenyl;
Claim 17
Dependent Claim
7 words
R 7 is hydrogen or phenyl; .Iadd.
Claim 18
Dependent Claim
7 words
R 7 is hydrogen or phenyl; .Iadd.
Claim 19
Dependent Claim
6 words
R 8 is hydrogen or phenyl;
Claim 20
Dependent Claim
6 words
R 8 is hydrogen or phenyl;
Claim 21
Dependent Claim
7 words
R 9 is hydrogen or p-methoxyphenyl; .Iaddend.
Claim 22
Dependent Claim
7 words
R 9 is hydrogen or p-methoxyphenyl; .Iaddend.
Claim 23
Dependent Claim
19 words
the anion is an anionic function selected from the group consisting of perchlorate, fluoroborate, chloroferrate, chlorozincate and nitrate; and
Claim 24
Dependent Claim
19 words
the anion is an anionic function selected from the group consisting of perchlorate, fluoroborate, chloroferrate, chlorozincate and nitrate; and
Claim 25
Dependent Claim
7 words
X is oxygen or a sulfur atom;
Claim 26
Dependent Claim
7 words
X is oxygen or a sulfur atom;
Claim 27
Dependent Claim
17 words
said photoconductive polymeric compound comprising at least one compound selected from the group consisting of poly-N-vinylcarbazole, brominated
Claim 28
Dependent Claim
17 words
said photoconductive polymeric compound comprising at least one compound selected from the group consisting of poly-N-vinylcarbazole, brominated
Claim 29
Dependent Claim
34 words
An electrophotographic material according to claim 1, wherein said sensitizer comprises at least one compound selected from the group consisting of 2-(α-phenyl-p-methoxystyryl)-4-[(2'-phenyl-4'-benzopyranylidene)methyl]benzopyrylium perchlorate, 2-p-methoxystyryl-4-[(2'-3",4"-dimethoxystyryl-3'-phenyl-6'-methyl-4'-benzopyranylidene)methyl]benzopyrylium perchlorate, 2-[(2'-phenyl-4'-benzopyranylidene) methyl]-3-phenyl benzopyrylium fluoroborate, 2-[(2'-phenyl-4'-benzopyranylidene)methyl]-4-p-methoxyphenyl benzothiopyrylium perchlorate, and 2-[(2'-phenyl-4'-benzothiopyryanylidene)methyl]-4-p-methoxyphenyl
Claim 30
Dependent Claim
26 words
An electrophotographic material according to claim 1, wherein said combination comprises 100 weight parts of photoconductive polymeric compound and 0.01 to 3.0 weight parts of sensitizer.
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) | 1979-01-26 | 1979-07-28 | 1980-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-26 | 1983-07-28 | 1984-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-26 | 1987-07-28 | 1988-01-27 | $7700.00 | Window Closed / Lapsed |