US4362798A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrazone and pyrazoline or acetosol yellow containing charge transport layer, photoconductor and electrophotographic process using the same
Assignee: IBM Information Products Corp
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Filing: 1981-05-18
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Granted: 1982-12-07
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Expires: 2001-05-18
Abstract
Abstract A process for electrophotographic reproduction, and a layered electrophotographic plate having a conventional charge generation layer and a p-type hydrazone containing charge transport layer, in which the surface of the charge transport layer is selectively discharged by actinic radiation as a result of the migration through the transport layer of charges generated in the charge generation layer as a result of the actinic radiation and injected into the transport layer, the hydrazone having the composition p-diethylaminobenzaldehyde-(diphenylhydrazone), i.e., <IMAGE> and the charge transport layer including DEASP or Acetosol Yellow in an amount not exceeding 13 wt. % of the hydrazone.
Inventors
- 👤 Howard W. Anderson
- 👤 Robert B. Champ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:49
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0616; G03G5/0664; G03G5/0666; G03G5/0668; G03G5/067
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
124 words
In an electrophotographic element comprising: an electrically conductive layer; a charge generation layer responsive to actinic radiation to generate an electron-hole pair; and a p-type charge transport layer adjacent the charge generation layer, the charge transport layer comprising a hydrazone of the composition p-diethylaminobenzaldehyde(diphenylhydrazone), i.e.: ##STR4## and a polymeric binder; whereby holes generated by photoelectric phenomenon in the charge generation layer may be transported through the charge transport layer to facilitate localized selective discharge of charged surfaces of the element, the improvement comprising: the addition of [DEASP or Acetosol Yellow] 1-phenyl-3[p-diethylaminostyryl]-5-[p-diethylaminophenyl]-pyrazoline to said charge transport layer in an amount which is effective to produce the result that the photosensitivity of the photoconductor is not appreciably affected by exposure to limited amounts of ambient light.
Claim 2
Dependent Claim
124 words
In an electrophotographic element comprising: an electrically conductive layer; a charge generation layer responsive to actinic radiation to generate an electron-hole pair; and a p-type charge transport layer adjacent the charge generation layer, the charge transport layer comprising a hydrazone of the composition p-diethylaminobenzaldehyde(diphenylhydrazone), i.e.: ##STR4## and a polymeric binder; whereby holes generated by photoelectric phenomenon in the charge generation layer may be transported through the charge transport layer to facilitate localized selective discharge of charged surfaces of the element, the improvement comprising: the addition of [DEASP or Acetosol Yellow] 1-phenyl-3[p-diethylaminostyryl]-5-[p-diethylaminophenyl]-pyrazoline to said charge transport layer in an amount which is effective to produce the result that the photosensitivity of the photoconductor is not appreciably affected by exposure to limited amounts of ambient light.
Claim 3
Dependent Claim
22 words
The electrophotographic element of claim 1 wherein [DEASP] 1-phenyl-3[p-diethylaminostyryl]-5-[p-diethylaminophenyl]-pyrazoline is added in the amount of about 5 wt. % of said hydrazone.
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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) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |