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US4063947A
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US
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Photoconductive insulating films comprising fluorenone-substituted oligomers
Assignee: Xerox Corp
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Filing: 1975-10-29
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Granted: 1977-12-20
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Expires: 1995-10-29
Abstract
Abstract Composite photoconductive insulating films comprising a thin layer of photoconductive materials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer contiguous therewith comprising a minor portion of electronically inert binder in a major portion of an electronically active oligomer of the formula: ##STR1## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; m is 1-10; and n is in the range of from about 3 to about 25.
Inventors
- 👤 John M. Pochan
- 👤 Sam R. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:04
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/0601; G03G5/0609; G03G5/0618; G03G5/075
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
116 words
A composite photoconductive insulating film comprising a layer of photoconductive materials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer contiguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR4## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0--4; m is 1-10; and n is in the range of from about 3 to about 25.
Claim 2
Dependent Claim
116 words
A composite photoconductive insulating film comprising a layer of photoconductive materials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer contiguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR4## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0--4; m is 1-10; and n is in the range of from about 3 to about 25.
Claim 3
Dependent Claim
67 words
The composite photoconductive insulating film of Claim 1 wherein the thickness of the layer of photoconductive materials in this composite film can range from about 0.02 to about 5 microns and the thickness of the insulating layer from about 1 to about 200 microns, the ratio of thickness of the layer of photoconductive materials to the insulating layer being maintained within from about 1:2 to about 1:200.
Claim 4
Dependent Claim
75 words
An electrophotographic imaging member comprising a conductive substrate and a composite photoconductive insulating film overlying at least a portion of said substrate, said composite comprising a layer of photo conductivematerials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer contiguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR5##
Claim 5
Dependent Claim
75 words
An electrophotographic imaging member comprising a conductive substrate and a composite photoconductive insulating film overlying at least a portion of said substrate, said composite comprising a layer of photo conductivematerials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer contiguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR5##
Claim 6
Dependent Claim
60 words
R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; m is 1-10; and n is in the range of from about 3 to about 25.
Claim 7
Dependent Claim
60 words
R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting of NO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; m is 1-10; and n is in the range of from about 3 to about 25.
Claim 8
Dependent Claim
66 words
The electrophotographic imaging member of claim 3 wherein the thickness of the layer of photoconductive materials in this composite film can range from about 0.02 to about 5 microns and the thickness of the insulating layer from about 1 to about 200 microns, the ratio of thickness of the layer of photoconductive materials to the insulating layer being maintained within from about 1:2 to about 1:200.
Claim 9
Dependent Claim
151 words
An electrostatographic imaging process comprising: a. providing an electrophotographic imaging member comprising a conductive substrate and a composite photoconductive insulating film overlying at least a portion of said substrate, said composite comprising a layer of photoconductive materials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer continguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR6## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting ofNO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; m is 1-10; and n is in the range of from about 3 to about 25. b. forming a latent electrostatic image on said imaging member.
Claim 10
Dependent Claim
151 words
An electrostatographic imaging process comprising: a. providing an electrophotographic imaging member comprising a conductive substrate and a composite photoconductive insulating film overlying at least a portion of said substrate, said composite comprising a layer of photoconductive materials having substantial spectral response in the visible region of the electromagnetic spectrum and a substantially colorless insulating layer continguous therewith comprising a polymeric solid containing a minor portion of electronically inert polymeric binder and a major portion of electronically active oligomer of the formula: ##STR6## R' is hydrogen or methyl; R" is alkyl of 1-10 carbon atoms; X and Y are independently selected from the group consisting ofNO 2 , halogen, cyano and --CF 3 ; Z is oxygen or dicyanomethylene; a and a' can range from 0-3; m is 1-10; and n is in the range of from about 3 to about 25. b. forming a latent electrostatic image on said imaging member.
Claim 11
Dependent Claim
64 words
The process of claim 5 wherein the thickness of the layer of photoconductive materials in this composite film can range from about 0.02 to about 5 microns and the thickness of the insulating layer from about 1 to about 200 microns, the ratio of thickness of the layer of photoconductive materials to the insulating layer being maintained within from about 1:2 to about 1:200.
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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) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |