US4134764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Semiconductive and sensitized photoconductive compositions
Assignee: 3M Co
•
Filing: 1976-11-19
•
Granted: 1979-01-16
•
Expires: 1996-11-19
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
2026-10-25 19:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0605; G03G5/0607; G03G5/0609; H; H01; H01B; H01B1/00; H01B1/06; H01B1/12; H10; H10K; H10K30/00; H10K30/30; H10K30/50; H10K85/00; H10K85/10; H10K85/141; H10K85/146; Y; Y02; Y02E; Y02E10/00; Y02E10/50; Y02E10/549
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
123 words
An article comprising semiconductive composition comprising a polymeric binder which is not an organic, photoconductive, polymer binder and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the group consisting of cyclopropane, 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 said dye being present in sufficient concentration so that the conductive properties of the semiconductive composition differ by at least 20% from the conductive properties of said binder without said dye coated onto an organic photoconductive binder layer which has been coated onto a substrate.
Claim 2
Dependent Claim
123 words
An article comprising semiconductive composition comprising a polymeric binder which is not an organic, photoconductive, polymer binder and a dye comprising at least two quinoid benzene rings linked through a bridging moiety selected from the group consisting of cyclopropane, 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 said dye being present in sufficient concentration so that the conductive properties of the semiconductive composition differ by at least 20% from the conductive properties of said binder without said dye coated onto an organic photoconductive binder layer which has been coated onto a substrate.
Claim 3
Dependent Claim
14 words
The article of claim 1 wherein said polymeric binder is an organic photoconductive binder.
References Cited (Backward Citations)
US3617270A
Cited
US3824099A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-15 | 1982-07-17 | 1983-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-15 | 1986-07-17 | 1987-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-15 | 1990-07-17 | 1991-01-16 | $7700.00 | Window Closed / Lapsed |