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US4115116A Expired / Lapsed US ⏱️ 0.0 years remaining

Imaging member having a polycarbonate-biphenyl diamine charge transport layer

Assignee: Xerox Corp
•
Filing: 1977-05-04
•
Granted: 1978-09-19
•
Expires: 1997-05-04
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Abstract

Abstract A photosensitive member having at least two electrically operative layers is disclosed. The first layer comprises a photoconductive layer which is capable of photogenerating holes and injecting photogenerated holes into a contiguous charge transport layer. The charge transport layer comprises an electrically inactive organic resinous material containing from about 15 to about 75 percent by weight of N,N'-diphenyl-N,N'-bis(phenylmethyl)-[1,1'-biphenyl]-4,4'-diamine. The charge transport layer while substantially non-absorbing in the spectral region of intended use is "active" in that it allows injection of photogenerated holes from the photoconductive layer, and allows these holes to be transported through the charge transport layer. This structure may be imaged in the conventional xerographic mode which usually includes charging, exposure to light and development.

Inventors

  • 👤 Milan Stolka
  • 👤 Damodar M. Pai
  • 👤 John F. Yanus

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-23 13:01
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/043; G03G5/0436; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/061443

Claims Analysis

Total Claims: 7
Claim 1
Independent Claim 106 words
An imaging member comprising a charge generation layer comprising a layer of photoconductive material and a contiguous charge transport layer of a polycarbonate resin having dispersed therein from about 15 to about 75 percent by weight of a material selected from the group consisting of N,N'-diphenyl-N,N'-bis(phenylmethyl)-[1,1'-biphenyl]-4,4'-diamine, said photoconductive layer exhibiting the capability of photogeneration of holes and injection of said holes and said charge transport layer being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said charge transport layer.
Claim 2
Dependent Claim 106 words
An imaging member comprising a charge generation layer comprising a layer of photoconductive material and a contiguous charge transport layer of a polycarbonate resin having dispersed therein from about 15 to about 75 percent by weight of a material selected from the group consisting of N,N'-diphenyl-N,N'-bis(phenylmethyl)-[1,1'-biphenyl]-4,4'-diamine, said photoconductive layer exhibiting the capability of photogeneration of holes and injection of said holes and said charge transport layer being substantially non-absorbing in the spectral region at which the photoconductive layer generates and injects photogenerated holes but being capable of supporting the injection of photogenerated holes from said photoconductive layer and transporting said holes through said charge transport layer.
Claim 3
Dependent Claim 20 words
The member according to claim 1 wherein the polycarbonate resin has a (Mw) of from about 20,000 to about 120,000.
Claim 4
Dependent Claim 23 words
The member according to claim 1 wherein the polycarbonate resin is poly(4,4'-isopropylidene-diphenylene carbonate) having a (Mw) of from about 35,000 to about 40,000.
Claim 5
Dependent Claim 22 words
The member according to claim 1 wherein the polycarbonate is poly(4,4'-isopropylidene-diphenylene carbonate) having a (Mw) of from about 40,000 to about 45,000.
Claim 6
Dependent Claim 37 words
The member according to claim 1 wherein the photoconductive material is selected from the group consisting of amorphous selenium, trigonal selenium, and selenium alloys selected from the group consisting of selenium-tellurium, selenium-tellurium-arsenic and selenium-arsenic and mixtures thereof.
Claim 7
Dependent Claim 13 words
The member according to claim 5 wherein the photoconductive material is trigonal selenium.

References Cited (Backward Citations)

US3265496A Cited
US3624226A Cited
US3870516A Cited
US3928034A Cited
US3963779A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1981-09-18 1982-03-20 1982-09-19 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1985-09-18 1986-03-20 1986-09-19 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1989-09-18 1990-03-20 1990-09-19 $7700.00 Window Closed / Lapsed

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