Patent US1748649A successfully refreshed from Google Patents.
US4772525A
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Photoresponsive imaging members with high molecular weight polysilylene hole transporting compositions
Assignee: Xerox Corp
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Filing: 1987-05-01
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Granted: 1988-09-20
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Expires: 2007-05-01
Abstract
Abstract Photoresponsive imaging members comprised of hole transporting polysilylene compounds with a single peak molecular weight distribution, and wherein the polysilylenes selected have excluded therefrom molecular weight fractions of less than 50,000 thereby enabling, for example, the resulting imaging members to be substantially resistant to liquid ink developer compositions for an extended number of imaging cycles when these members are incorporated into electrostatographic imaging devices.
Inventors
- 👤 Santokh S. Badesha
- 👤 Milan Stolka
- 👤 Frederick J. Roberts, Jr.
- 👤 Ronald J. Weagley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:20
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/078
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
111 words
An improved layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a polysilylene hole transporting compound of the following formula with a weight average molecular weight of from about 400,000 to about 1,000,000, and a weight average molecular weight to a number average molecular weight ratio of from about 1.3 to about 3 ##STR2## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, substituted aryl, and alkoxy; and n, m, and p are numbers that represent the percentage of the monomer unit in the polysilylene compound.
Claim 2
Dependent Claim
111 words
An improved layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and a polysilylene hole transporting compound of the following formula with a weight average molecular weight of from about 400,000 to about 1,000,000, and a weight average molecular weight to a number average molecular weight ratio of from about 1.3 to about 3 ##STR2## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, substituted aryl, and alkoxy; and n, m, and p are numbers that represent the percentage of the monomer unit in the polysilylene compound.
Claim 3
Dependent Claim
113 words
An improved layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and situated therebetween a polysilylene hole transporting compound of the following formula with a weight average molecular weight of from about 400,000 to about 1,000,000, and a weight average molecular weight to a number average molecular weight ratio of from about 1.3 to about 3 ##STR3## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, substituted aryl, and alkoxy; and n, m, and p are numbers that represent the percentage of the monomer unit in the polysilylene compound.
Claim 4
Dependent Claim
113 words
An improved layered photoresponsive imaging member comprised of a supporting substrate, a photogenerating layer, and situated therebetween a polysilylene hole transporting compound of the following formula with a weight average molecular weight of from about 400,000 to about 1,000,000, and a weight average molecular weight to a number average molecular weight ratio of from about 1.3 to about 3 ##STR3## wherein R 1 , R 2 , R 3 , R 4 , R 5 and R 6 are independently selected from the group consisting of alkyl, aryl, substituted alkyl, substituted aryl, and alkoxy; and n, m, and p are numbers that represent the percentage of the monomer unit in the polysilylene compound.
Claim 5
Dependent Claim
17 words
An improved layered photoresponsive imaging member in accordance with claim 1 wherein the supporting substrate is conductive.
Claim 6
Dependent Claim
29 words
An improved layered photoresponsive imaging member in accordance with claim 1 wherein the photogenerating layer is comprised of photogenerating pigments selected from inorganic photoconductive pigments, and organic photoconductive pigments.
Claim 7
Dependent Claim
23 words
An improved layered photoresponsive imaging member in accordance with claim 4 wherein the inorganic pigments are amorphous selenium, selenium alloys, or trigonal selenium.
Claim 8
Dependent Claim
24 words
An improved layered photoresponsive imaging member in accordance with claim 4 wherein the organic pigments are metal phthalocyanines, metal free phthalocyanines, or vanadyl phthalocyanines.
Claim 9
Dependent Claim
17 words
An improved layered photoresponsive imaging member in accordance with claim 1 wherein the polysilylene is poly(methylphenyl silylene).
Claim 10
Dependent Claim
17 words
An improved layered photoresponsive imaging member in accordance with claim 1 wherein the polysilylene is poly(n-propylmethyl silylene)-co-methylphenylsilylene.
Claim 11
Dependent Claim
17 words
An improved layered photoresponsive imaging member in accordance with claim 2 wherein the polysilylene is poly(methylphenyl silylene).
Claim 12
Dependent Claim
20 words
An improved layered photoresponsive imaging member in accordance with claim 1 wherein there is further included thereover a protective overcoating.
Claim 13
Dependent Claim
20 words
An improved layered photoresponsive imaging member in accordance with claim 2 wherein there is further included thereover a protective overcoating.
Claim 14
Dependent Claim
41 words
A process of imaging which comprises providing the imaging member of claim 1, forming thereon an electrostatic latent image, thereafter accomplishing the development of this image, subsequently transferring the developed image to a suitable substrate, and optionally affixing the image thereto.
Claim 15
Dependent Claim
41 words
A process of imaging which comprises providing the imaging member of claim 2, forming thereon an electrostatic latent image, thereafter accomplishing the development of this image, subsequently transferring the developed image to a suitable substrate, and optionally affixing the image thereto.
Claim 16
Dependent Claim
25 words
A process for generating developed electrostatic latent images in accordance with claim 12 wherein the polysilylene is poly(methylphenyl silylene), poly(n-propylmethyl silylene)-comethylphenyl silylene, or poly(n-propylmetyl silylene).
Claim 17
Dependent Claim
25 words
A process for generating developed electrostatic latent images in accordance with claim 13 wherein the polysilylene is poly(methylphenyl silylene), poly(n-propylmethyl silylene)-co-methylphenyl silyene, or poly(n-propylmethyl silylene).
Claim 18
Dependent Claim
18 words
A process in accordance with claim 12 wherein there is selected as the developer compositions a liquid ink.
Claim 19
Dependent Claim
19 words
A process in accordance with claim 16 wherein the imaging member retain its electrical characteristics for 100,000 imaging cycles.
Claim 20
Dependent Claim
33 words
An improved layered imaging member in accordance with claim 1 wherein the polysilylene possesses a weight average molecular weight of about 519,000, and a weight average number average molecular weight ratio of 1.6.
Claim 21
Dependent Claim
33 words
An improved layered imaging member in accordance with claim 1 wherein the polysilylene possesses a weight average molecular weight of about 717,000, and a weight average number average molecular weight ratio of 1.7.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |