US3658520A
Expired / Lapsed
US
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Photoconductive elements containing as photoconductors triarylamines substituted by active hydrogen-containing groups
Assignee: Eastman Kodak Co
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Filing: 1968-02-20
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Granted: 1972-04-25
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Expires: 1988-02-20
Abstract
Abstract Triarylamines having at least one of the aryl radicals substituted by an active hydrogen-containing group are good organic photoconductors in electrophotographic systems.
Inventors
- 👤 Thomas B Brantly
- 👤 Lawrence E Contois
- 👤 Charles J Fox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 05:03
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0618
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
39 words
A photoconductive element as described in claim 1 wherein said pyrylium salt is present in an amount from about 0.005 to 5.0 percent by weight based on said photoconductive composition and said active hydrogen-containing group is a carboxy radical.
Claim 2
Dependent Claim
17 words
a naphthylene radical; and c. X is an active hydrogen-containing group selected from the group consisting of:
Claim 3
Dependent Claim
3 words
an ester radical,
Claim 4
Dependent Claim
3 words
a hydroxy radical,
Claim 5
Dependent Claim
40 words
A photoconductive eleMent as described in claim 1 wherein said pyrylium salt is present in an amount from about 0.005 to 5.0 percent by weight based on said photoconductive composition and said active hydrogen-containing group is an alkylene carboxy radical.
Claim 6
Dependent Claim
40 words
A photoconductive element as described in claim 1 wherein said pyrylium salt is present in an amount from about 0.005 to 5.0 percent by weight based on said photoconductive composition and said active hydrogen-containing group is an acyl halide radical.
Claim 7
Dependent Claim
4 words
an alkylene hydroxy radical,
Claim 8
Dependent Claim
4 words
an acid anhydride radical,
Claim 9
Dependent Claim
39 words
A photoconductive element as described in claim 1 wherein said pyrylium salt is present in an amount from about 0.005 to 5.0 percent by weight based on said photoconductive composition and said active hydrogen-containing group is an ester radical.
Claim 10
Dependent Claim
58 words
An electrophotographic element comprising a conducting support having coated thereon a photoconductive composition comprising a sensitizer which is a pyrylium salt, a polymeric binder and a photoconductor selected from the group consisting of: methyl p-diphenylaminobenzoate, N,N-diphenylanthranilic acid, ethyl 2,6-diphenyl-4-(p-diphenylaminophenyl)benzoate, 1-(p-diphenylaminophenyl)-1-hydroxy-3-butyne, 4-hydroxymethyltriphenylamine, 1-(p-diphenylaminophenyl)ethanol, 3-p-diphenylaminophenylpropionic acid, 3-p-diphenylaminophenyl-1-propanol, 4-hydroxytriphenylamine, 2-hydroxytriphenylamine, 1-(p-diphenylaminophenyl)hexanol, 1-(p-diphenylaminophenyl)dodeconal, p-diphenylaminobenzoic acid anhydride, p-diphenylaminobenzoic acid N,N-diphenylamide, and p-diphenylaminobenzoic acid.
Claim 11
Dependent Claim
5 words
an alkylene carboxy radical, and
Claim 12
Dependent Claim
4 words
an acyl halide radical.
Claim 13
Dependent Claim
63 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent, by weight, based on said photoconductive composition of methyl p-diphenylaminobenzoate, b. about 0.005 to 5.0 percent, by weight, based on said photoconductive composition of a pyrylium salt as a sensitizer, and c. a film-forming polymeric binder for said photoconductor.
Claim 14
Dependent Claim
63 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent by weight based on said photoconductive composition of ethyl 2,6-diphenyl-4-(p-diphenylaminophenyl)benzoate, b. about 0.005 to 5.0 percent by weight based on said photoconductive composition of a pyrylium salt as a sensitizer and c. a film-forming polymeric binder for said photoconductor.
Claim 15
Dependent Claim
62 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent by weight based on said photoconductive composition of 1-(p-diphenylamino-phenyl)-1-hydroxy-3-butyne, b. about 0.005 to 5.0 percent by weight based on said photoconductive composition of a pyrylium salt at a sensitizer and c. a film-forming polymeric binder for said photoconductor.
Claim 16
Dependent Claim
62 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent by weight based on said photoconductive composition of 4-hydroxymethyltriphenylamine, b. about 0.005 to 5.0 percent by weight based on said photoconductive composition of a pyrylium salt as a sensitizer and c. a film-forming polymeric binder for said photoconductor.
Claim 17
Dependent Claim
62 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent by weight based on said photoconductive composition of 1-(p-diphenylaminophenyl) ethanol, b. about 0.005 to 5.0 percent by weight based on said photoconductive composition of a pyrylium salt as a sensitizer and a film-forming polymeric binder for said photoconductor.
Claim 18
Dependent Claim
63 words
A photoconductive element for use in electrophotography comprising a conducting support having coated thereon a photoconductive composition comprising: a. about 10 to 60 percent by weight based on said photoconductive composition of p-diphenylaminobenzoic acid, b. about 0.005 to 5.0 percent by weight based on said photoconductive composition of a pyrylium salt as a sensitizer and c. a film-forming polymeric binder for said photoconductor.
Claim 19
Dependent Claim
15 words
The photoconductive element of claim 7 wherein the film-forming polymeric binder is poly(vinyl meta-bromobenzoate-co-vinyl acetate).
Claim 20
Dependent Claim
15 words
The photoconductive element of claim 8 wherein the film-forming polymeric binder is poly(vinyl meta-bromobenzoate-co-vinyl acetate).
Claim 21
Dependent Claim
15 words
The photoconductive element of claim 9 wherein the film-forming polymeric binder is poly(vinyl meta-bromobenzoate-co-vinyl acetate).
Claim 22
Dependent Claim
15 words
The photoconductive element of claim 10 wherein the film-forming polymeric binder is poly(vinyl meta-boromobenzoate-co-vinyl acetate).
Claim 23
Dependent Claim
15 words
The photoconductive element of claim 11 wherein the film-forming polymeric binder is poly(vinyl meta-bromobenzoate-co-vinyl acetate).
Claim 24
Dependent Claim
15 words
The photoconductive element of claim 12 wherein the film-forming polymeric binder is poly(vinyl meta-bromobenzoate-co-vinyl acetate).
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |