US5248580A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photoconductive imaging members with ladder polymers
Assignee: University of Rochester
•
Filing: 1992-03-02
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Granted: 1993-09-28
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Expires: 2012-03-02
Abstract
Abstract A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer selected from the group consisting of those represented by the following formulas: ##STR1## and mixtures thereof, wherein n represents the number of segments, and a charge transport layer.
Inventors
- 👤 Milan Stolka
- 👤 Martin A. Abkowitz
- 👤 Beng S. Ong
- 👤 Samson A. Jenekhe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:16
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/0666; C08G73/0677; C08G73/0683; C08G73/0688; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/075; G03G5/076; G03G5/0763; G03G5/0766
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
45 words
A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer selected from the group consisting of those represented by the following formulas: ##STR4## and mixtures thereof, wherein n represents the number of segments, and a charge transport layer.
Claim 2
Dependent Claim
45 words
A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer selected from the group consisting of those represented by the following formulas: ##STR4## and mixtures thereof, wherein n represents the number of segments, and a charge transport layer.
Claim 3
Dependent Claim
45 words
A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer of the formula selected from the group consisting of those represented by the following formulas: ##STR5## wherein n represents the number of segments, and a hole transport layer.
Claim 4
Dependent Claim
45 words
A photoconductive imaging member comprised of a supporting substrate, a photogenerating layer comprised of a ladder polymer of the formula selected from the group consisting of those represented by the following formulas: ##STR5## wherein n represents the number of segments, and a hole transport layer.
Claim 5
Dependent Claim
30 words
An imaging member in accordance with claim 1 wherein the ladder polymer is of the following formula: ##STR6## wherein n is an integer from between about 10 to about 1,000.
Claim 6
Dependent Claim
29 words
A photoconductive imaging member in accordance with claim 1 wherein the photogenerating layer is in contact with and is situated between the supporting substrate and the charge transport layer.
Claim 7
Dependent Claim
29 words
A photoconductive imaging member in accordance with claim 1 wherein the charge transport layer is in contact with and is situated between the supporting substrate and the photogenerating layer.
Claim 8
Dependent Claim
34 words
A photoconductive imaging member in accordance with claim 1 wherein the photoconductive imaging member includes a metal oxide hole blocking layer in contact with and situated between the supporting substrate and the photogenerating layer.
Claim 9
Dependent Claim
16 words
A photoconductive imaging member in accordance with claim 6 wherein the metal oxide is aluminum oxide.
Claim 10
Dependent Claim
28 words
A photoconductive imaging member in accordance with claim 6 wherein the metal oxide hole blocking layer has a thickness of from between about 100 and about 500 Angstroms.
Claim 11
Dependent Claim
35 words
A photoconductive imaging member in accordance with claim 6 wherein the photoconductive imaging member contains an adhesive interface layer in contact with and situated between the supporting substrate and the metal oxide hole blocking layer.
Claim 12
Dependent Claim
29 words
A photoconductive imaging member in accordance with claim 9 wherein the adhesive interface layer comprises a polymeric material selected from the group consisting of polyester, polyvinylbutyral, and polyvinyl pyrrolidone.
Claim 13
Dependent Claim
25 words
A photoconductive imaging member in accordance with claim 10 wherein the adhesive interface layer has a thickness of from between about 0.1 and 0.6 micron.
Claim 14
Dependent Claim
16 words
A photoconductive imaging member in accordance with claim 1 wherein the supporting substrate is a metal.
Claim 15
Dependent Claim
16 words
A photoconductive imaging member in accordance with claim 12 wherein the metal is aluminum or titanium.
Claim 16
Dependent Claim
18 words
A photoconductive imaging member in accordance with claim 2 wherein the supporting substrate is an organic polymeric composition.
Claim 17
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 2 wherein the supporting substrate has a thickness of from about 3 to about 100 mils.
Claim 18
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 2 wherein the photogenerating layer has a thickness of from about 0.05 to about 10 microns.
Claim 19
Dependent Claim
25 words
A photoconductive imaging member in accordance with claim 2 wherein the charge transport layer has a thickness of from about 5 to about 50 micrometers.
Claim 20
Dependent Claim
19 words
A photoconductive imaging member in accordance with claim 1 wherein the hole transport layer comprises an aryl amine compound.
Claim 21
Dependent Claim
73 words
A photoconductive imaging member in accordance with claim 18 wherein the aryl amine comprises molecules of the formula: ##STR7## dispersed in a highly insulating and transparent organic resinous binder wherein X, Y and Z are selected from the group consisting of hydrogen, an alkyl group with from 1 to about 25 carbon atoms and a halogen, and at least one of X, Y and Z is independently an alkyl group or a halogen.
Claim 22
Dependent Claim
37 words
A photoconductive imaging member in accordance with claim 19 wherein X is selected from the group consisting of ortho (CH 3 ), meta (CH 3 ), para (CH 3 ), ortho (Cl), meta (Cl), and para (Cl).
Claim 23
Dependent Claim
27 words
A photoconductive imaging member in accordance with claim 19 wherein the resinous binder is a polyester, a polyvinyl butyral, a polystyrene, a polycarbonate, or a polyvinyl formal.
Claim 24
Dependent Claim
56 words
A photoconductive imaging member comprised of a supporting substrate, and a photogenerating layer in contact therewith comprised of a ladder polymer of the formula selected from the group consisting of those represented by the following formulas: ##STR8## wherein n represents the number of segments, and wherein n represents a number from about 10 to about 1,000.
Claim 25
Dependent Claim
56 words
A photoconductive imaging member comprised of a supporting substrate, and a photogenerating layer in contact therewith comprised of a ladder polymer of the formula selected from the group consisting of those represented by the following formulas: ##STR8## wherein n represents the number of segments, and wherein n represents a number from about 10 to about 1,000.
Claim 26
Dependent Claim
20 words
A photoconductive imaging member in accordance with claim 22 wherein the thickness of said photogenerating layer is about 25 nanometers.
Claim 27
Dependent Claim
18 words
A photoconductive imaging member in accordance with claim 22 wherein said imaging member charges both positively and negatively.
Claim 28
Dependent Claim
19 words
A photoconductive imaging member in accordance with claim 1 wherein said charge transport layer is comprised of a polysilylene.
Claim 29
Dependent Claim
21 words
A photoconductive imaging member in accordance with claim 1 wherein said charge transport layer is comprised of a poly(aryl amine) compound.
Claim 30
Dependent Claim
47 words
A method of imaging comprising the steps of (a) generating an electrostatic image on the photoconductive imaging member of claim 1; (b) subsequently developing the electrostatic image; (c) transferring the developed electrostatic image to a suitable substrate; and (d) permanently affixing the transferred image to the substrate.
Claim 31
Dependent Claim
24 words
A method of imaging in accordance with claim 27 wherein the electrostatic image is developed by cascade, touchdown, powder cloud, or magnetic brush methods.
Claim 32
Dependent Claim
28 words
A method of imaging in accordance with claim 27 wherein the developed electrostatic image is transferred to a substrate by means of a corotron or a biased roll.
Claim 33
Dependent Claim
14 words
A method of imaging in accordance with claim 27 wherein the substrate is paper.
Claim 34
Dependent Claim
47 words
A photoconductive imaging member in accordance with claim 1 wherein the photogenerating layer is comprised of a ladder polymer selected from the group consisting of those represented by the following formulas: ##STR9## and mixtures thereof, wherein n represents the number of segments, and a charge transport layer.
Claim 35
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the molecular weight of said ladder polymer is from about 25,000 to about 200,000.
Claim 36
Dependent Claim
24 words
A photoconductive imaging member in accordance with claim 1 wherein the molecular weight of said ladder polymer is from about 100,000 to about 200,000.
Claim 37
Dependent Claim
24 words
The photoconductive imaging member in accordance with claim 2 wherein the molecular weight of said ladder polymer is from about 25,000 to about 200,000.
Claim 38
Dependent Claim
20 words
A photoconductive imaging member in accordance with claim 1 wherein n is a number from about 10 to about 1,000.
Claim 39
Dependent Claim
20 words
A photoconductive imaging member in accordance with claim 2 wherein n is a number from about 10 to about 1,000.
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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) | 1996-09-27 | 1997-03-29 | 1997-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-09-27 | 2001-03-29 | 2001-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-09-27 | 2005-03-29 | 2005-09-28 | $7700.00 | Window Closed / Lapsed |