US4500621A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitive electrophotographic plates containing squaric acid methine dyes suspended in a binder
Assignee: Ricoh Co Ltd
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Filing: 1983-04-11
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Granted: 1985-02-19
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Expires: 2003-04-11
Abstract
Abstract Electrographic imaging process and electrographic plates utilized therein are provided wherein the photoconductive layer comprises a squaric acid methine dye admixed with a binder or a photoconductive material. The photoconductive layer may also comprise the squaric acid methine dye, a binder and a charge transport material.
Inventors
- 👤 Herbert K. Wurster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0607; C; C09; C09B; C09B23/00; C09B23/0066; G03G5/0609; G03G5/0611; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0629; G03G5/0631; G03G5/0644; G03G5/0646; G03G5/065
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
221 words
A single layer photoreceptor plate comprising a solid continuous photoconductor layer of uniform thickness in the range of 1-60 microns consisting essentially of a noncharge-transporting binder material and a charge-generating, charge-transporting squaric acid methine dye selected from the group consisting of compounds of the Formula I: ##STR8## wherein A and B are independently, ##STR9## ##STR10## ##STR11## wherein R 1 , R 2 , R 3 are independently H, OH or alkyl of 1 to 6 carbon atoms, NR 4 R 5 , wherein R 4 and R 5 are independnetly alkyl of 1 to 6 carbon atoms; ##STR12## R 6 and R 7 are independently alkyl of 1 to 6 carbon atoms; and R 8 is independently H, OR 9 or halogen, wherein R 9 is alkyl of 1 to 6 carbon atoms; ##STR13## wherein R 10 , R 11 , R 12 and R 13 are independently H, OH or alkyl of 1 to 6 carbon atoms; ##STR14## wherein R 14 , R 15 and R 16 are independently alkyl of 1 to 6 carbon atoms; and R 17 is independently H, OR 18 or halogen, wherein R 18 is alkyl of 1 to 6 carbon atoms; or ##STR15## wherein the proportion of said dye to said binder material in said photoconductor is in the range of 1:1 to 1:40.
Claim 2
Dependent Claim
221 words
A single layer photoreceptor plate comprising a solid continuous photoconductor layer of uniform thickness in the range of 1-60 microns consisting essentially of a noncharge-transporting binder material and a charge-generating, charge-transporting squaric acid methine dye selected from the group consisting of compounds of the Formula I: ##STR8## wherein A and B are independently, ##STR9## ##STR10## ##STR11## wherein R 1 , R 2 , R 3 are independently H, OH or alkyl of 1 to 6 carbon atoms, NR 4 R 5 , wherein R 4 and R 5 are independnetly alkyl of 1 to 6 carbon atoms; ##STR12## R 6 and R 7 are independently alkyl of 1 to 6 carbon atoms; and R 8 is independently H, OR 9 or halogen, wherein R 9 is alkyl of 1 to 6 carbon atoms; ##STR13## wherein R 10 , R 11 , R 12 and R 13 are independently H, OH or alkyl of 1 to 6 carbon atoms; ##STR14## wherein R 14 , R 15 and R 16 are independently alkyl of 1 to 6 carbon atoms; and R 17 is independently H, OR 18 or halogen, wherein R 18 is alkyl of 1 to 6 carbon atoms; or ##STR15## wherein the proportion of said dye to said binder material in said photoconductor is in the range of 1:1 to 1:40.
Claim 3
Dependent Claim
14 words
A photoreceptor plate according to claim 1 wherein A and B are independently ##STR16##
Claim 4
Dependent Claim
28 words
A photoreceptor plate according to claim 2 wherein R 1 is methyl, R 2 is hydrogen, R 3 is dimethyl- amino and A and B are the same.
Claim 5
Dependent Claim
24 words
A photoreceptor plate according to claim 1 wherein said binder is selected from the group consisting of polycarbonate resin, epoxy resins, and acrylic polymers.
Claim 6
Dependent Claim
240 words
An electrophotographic imaging process comprising the steps of subjecting a solid continuous photoconductor layer of a uniform thickness in the range of 1-60 microns, consisting essentially of a noncharge-transporting binder material and a charge-generating, charge-transporting squaric acid methine dye selected from the group consisting of compounds of the Formula I: ##STR17## wherein A and B are independently ##STR18## wherein R 1 , R 2 , R 3 are independently H, OH or alkyl of 1 to 6 carbon atoms, NR 4 R 5 , wherein R 4 and R 5 are independently alkyl of 1 to 6 carbon atoms; ##STR19## ##STR20## ##STR21## R 6 and R 7 independently alkyl of 1 to 6 carbon atoms; and R 8 is independently H, OR9 or halogen and wherein R 9 is alkyl of 1 to 6 carbon atoms; ##STR22## wherein R 10 , R 11 , R 12 and R 13 are independently H, OH or alkyl of 1 to 6 carbon atoms; ##STR23## wherein R 14 , R 15 and R 16 are independently alkyl of 1 to 6 carbon atoms and R 17 is independently OH, OR 18 or halogen, wherein R 18 is alkyl of 1 to 6 carbon atoms; or ##STR24## wherein the proportion of said dye to said binder material in said photoconductor is in the range of 1:1 to 1:40; and exposing said layer to an image pattern of radiation to which said layer is photosensitive.
Claim 7
Dependent Claim
240 words
An electrophotographic imaging process comprising the steps of subjecting a solid continuous photoconductor layer of a uniform thickness in the range of 1-60 microns, consisting essentially of a noncharge-transporting binder material and a charge-generating, charge-transporting squaric acid methine dye selected from the group consisting of compounds of the Formula I: ##STR17## wherein A and B are independently ##STR18## wherein R 1 , R 2 , R 3 are independently H, OH or alkyl of 1 to 6 carbon atoms, NR 4 R 5 , wherein R 4 and R 5 are independently alkyl of 1 to 6 carbon atoms; ##STR19## ##STR20## ##STR21## R 6 and R 7 independently alkyl of 1 to 6 carbon atoms; and R 8 is independently H, OR9 or halogen and wherein R 9 is alkyl of 1 to 6 carbon atoms; ##STR22## wherein R 10 , R 11 , R 12 and R 13 are independently H, OH or alkyl of 1 to 6 carbon atoms; ##STR23## wherein R 14 , R 15 and R 16 are independently alkyl of 1 to 6 carbon atoms and R 17 is independently OH, OR 18 or halogen, wherein R 18 is alkyl of 1 to 6 carbon atoms; or ##STR24## wherein the proportion of said dye to said binder material in said photoconductor is in the range of 1:1 to 1:40; and exposing said layer to an image pattern of radiation to which said layer is photosensitive.
Claim 8
Dependent Claim
13 words
A process according to claim 5 wherein A and B are independently. ##STR25##
Claim 9
Dependent Claim
26 words
A process according to claim 6 wherein R 1 is methyl, R 2 is hydrogen, R 3 is dimethylamino and A and B are the same.
Claim 10
Dependent Claim
23 words
A process according to claim 5 wherein said binder is selected from the group consisting of polycarbonate resin, epoxy resins, and acrylic polymers.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |