Patent US3739404A successfully refreshed from Google Patents.
Patent US4007043A successfully refreshed from Google Patents.
US4007043A
Expired / Lapsed
US
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Photoconductive elements with copolymer charge transport layers
Assignee: Xerox Corp
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Filing: 1975-07-16
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Granted: 1977-02-08
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Expires: 1995-07-16
Abstract
Abstract Method for achieving free radical initiated copolymerization of an addition monomer having pendant therefrom a strong donor group with an addition monomer having pendant therefrom a strong acceptor group. Copolymers prepared according to this method can be represented by the following formula: ##STR1## wherein R is hydrogen or methyl; R' is hydrogen or methyl; R" is hydrogen or methyl; R'" is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 - 4 carbon atoms and phenyl; a and b can range from 0 - 4; and n and m can range from about 5 to about 95 percent. The polymeric compositions prepared according to this method are suitable for use in electrophotography either alone as the primary photoresponsive entity or in combination with other photoconductive materials.
Inventors
- 👤 Milan Stolka
- 👤 Sam R. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:24
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; C; C08; C08F; C08F220/00; C08F220/02; C08F220/10; C08F220/12; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
131 words
An electrophotographic imaging member comprising a conductive substrate and a photoconductive insulating layer containing a copolymer of the formula: ##STR5## wherein R is hydrogen or methyl; R' is hydrogen or methyl; R" is alkyl of 1 - 5 carbon atoms; R'" is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 - 4 carbon atoms and phenyl; a and b can range from 0 - 4; and n can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and m can range from about 5 to about 95 percent of the total number of structural units of the copolymer.
Claim 2
Dependent Claim
131 words
An electrophotographic imaging member comprising a conductive substrate and a photoconductive insulating layer containing a copolymer of the formula: ##STR5## wherein R is hydrogen or methyl; R' is hydrogen or methyl; R" is alkyl of 1 - 5 carbon atoms; R'" is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 - 4 carbon atoms and phenyl; a and b can range from 0 - 4; and n can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and m can range from about 5 to about 95 percent of the total number of structural units of the copolymer.
Claim 3
Dependent Claim
28 words
The imaging member of claim 1 wherein the photoconductive insulating layer comprises a layer of photoconductive materials and contiguous therewith a charge carrier transporting layer containing the copolymer.
Claim 4
Dependent Claim
15 words
The imaging member of claim 2 wherein the layer of photoconductive material comprises amorphous selenium.
Claim 5
Dependent Claim
15 words
The imaging member of claim 2 wherein the layer of photoconductive materials comprises trigonal selenium.
Claim 6
Dependent Claim
153 words
The imaging member of claim 3 wherein the charge carrier transporting layer comprises a polymer having structural units from at least three distinct monomers, said polymer comprising from about 5 to about 90 percent structural units from the monomer ##STR6## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkykl of 1-4 carbon atoms and phenyl; from about 5 to about 90 percent structural units from the monomer ##STR7## wherein R" is hydrogen or methyl; R'" is selected from the group consisting of --NO 2 , halogen --CN and --CF 3 ; and a and b can range from 0-4 and from about 5 to 30 percent structural units from a monomer which is devoid of pendant group capable of charge transfer interaction with the pendant groups of either of the above monomers.
Claim 7
Dependent Claim
144 words
An electrophotographic imaging process comprising: a. providing an electrophotographic imaging member having a photoconductive insulating layer containing a copolymer of the formula: ##STR8## wherein R is hydrogen or methyl; R' is hydrogen or methyl; R" is alkyl of 1 - 5 carbon atoms; R'" is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 - 4 carbon atoms and phenyl; a and b can range from 0 - 4; and n can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and m can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and b. forming an electrostatic latent image on said member.
Claim 8
Dependent Claim
144 words
An electrophotographic imaging process comprising: a. providing an electrophotographic imaging member having a photoconductive insulating layer containing a copolymer of the formula: ##STR8## wherein R is hydrogen or methyl; R' is hydrogen or methyl; R" is alkyl of 1 - 5 carbon atoms; R'" is selected from the group consisting of --NO 2 , halogen, --CN and --CF 3 ; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1 - 4 carbon atoms and phenyl; a and b can range from 0 - 4; and n can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and m can range from about 5 to about 95 percent of the total number of structural units of the copolymer; and b. forming an electrostatic latent image on said member.
Claim 9
Dependent Claim
27 words
The process of claim 6 wherein the photoconductive insulating layer comprises a layer of photoconductive materials and contiguous therewith a charge carrier transporting layer containing the copolymer.
Claim 10
Dependent Claim
14 words
The process of claim 7 wherein the layer of photoconductive material comprises amorphous selenium.
Claim 11
Dependent Claim
14 words
The process of claim 7 wherein the layer of photoconductive material comprises trigonal selenium.
Claim 12
Dependent Claim
151 words
The imaging process of claim 7 wherein the charge carrier transporting layer comprises a polymer having structural units from at least three distinct monomers, said polymer comprising from about 5 to 90 percent structural units from the monomer ##STR9## wherein R is hydrogen or alkyl of 1-6 carbon atoms; R' is hydrogen or methyl; X and Y are independently selected from the group consisting of hydrogen, chlorine, bromine, alkyl of 1-4 carbon atoms and phenyl; from about 5 to about 90 percent structural units from the monomer ##STR10## wherein R" is hydrogen or methyl; R'" is selected from the group consisting of --NO 2 , halogen, --CN and CF 3 ; a and b can range from 0-4; and from about 5 to 30 percent structural units from a monomer which is devoid of pendant group capable of charge transfer interaction with the pendant groups of either of the above monomers.
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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) | 1980-02-08 | 1980-08-09 | 1981-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-08 | 1984-08-09 | 1985-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-08 | 1988-08-09 | 1989-02-08 | $7700.00 | Window Closed / Lapsed |