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US4222902A
Expired / Lapsed
US
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Semiconductive and sensitized photoconductive compositions
Assignee: 3M Co
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Filing: 1978-11-03
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Granted: 1980-09-16
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Expires: 1998-11-03
Abstract
Abstract Semiconductive compositions are produced by the inclusion of a particular class of dyes into a polymeric binder. When the binder is an organic photoconductive binder, the dyes act as exceptionally good sensitizers for the photoconductive material.
Inventors
- 👤 William A. Huffman
- 👤 Stephen P. Birkeland
- 👤 Kevin P. O'Leary
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:44
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0609; H; H10; H10K; H10K30/00; H10K30/30; H10K85/00; H10K85/10; H10K85/111; H10K85/141; H10K85/146; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/549
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
91 words
A semiconductive composition comprising an organic polymeric binder of high dielectric strength and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the class of cycloproprane, cyclobutane and ═C═C═ n wherein n is 1 or 2, and wherein any ring carbons of the cyclopropane and cyclobutane bridging moieties not directly bonded to quinoid benzene rings are bonded to oxygen atoms to complete a carbonyl group wherein said dye is present in a concentration of at least 0.5×10 31 6 moles of dye/mole of binder.
Claim 2
Dependent Claim
91 words
A semiconductive composition comprising an organic polymeric binder of high dielectric strength and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the class of cycloproprane, cyclobutane and ═C═C═ n wherein n is 1 or 2, and wherein any ring carbons of the cyclopropane and cyclobutane bridging moieties not directly bonded to quinoid benzene rings are bonded to oxygen atoms to complete a carbonyl group wherein said dye is present in a concentration of at least 0.5×10 31 6 moles of dye/mole of binder.
Claim 3
Dependent Claim
27 words
The semiconductive composition of claim 1 wherein said organic polymeric material is selected from the class consisting of polyvinyl toluene, polystyrene, polyhalostyrene, polyacrylates, epoxy resins, and polycarbonates.
Claim 4
Dependent Claim
23 words
The semiconductive composition of claim 1 wherein the bridging moiety of the dye is selected from the group consisting of cyclopropane and cyclobutane.
Claim 5
Dependent Claim
30 words
The semiconductive composition of claim 1 wherein at least one quinoid benzene ring has at least one substituent in the ortho position which is no more electron withdrawing than chloro.
Claim 6
Dependent Claim
30 words
The semiconductive composition of claim 3 wherein at least one quinoid benzene ring has at least one substituent in the ortho position which is no more electron withdrawing than chloro.
Claim 7
Dependent Claim
61 words
The semiconductive composition of claim 1 wherein the dye is represented by any of the formulae: ##STR4## or A═C═C═.sub.n A wherein n is 1 or 2 A is a quinoid benzene ring which may have one or two substituents ortho to the quino oxygen which are no more electron withdrawing than chloro, and B is either A or an oxygen atom.
Claim 8
Dependent Claim
15 words
The semiconductive composition of claim 6 wherein the dye is selected from the formulae: ##STR5##
Claim 9
Dependent Claim
24 words
The semiconductive composition of claim 6 wherein said dye is present in a concentration of at least 0.5×10 -6 moles of dye/mole of binder.
Claim 10
Dependent Claim
24 words
The semiconductive composition of claim 7 wherein said dye is present in a concentration of at least 0.5×10 -6 moles of dye/mole of binder.
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) | 1983-09-16 | 1984-03-17 | 1984-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-09-16 | 1988-03-17 | 1988-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-09-16 | 1992-03-17 | 1992-09-16 | $7700.00 | Window Closed / Lapsed |