Patent US4367274A successfully refreshed from Google Patents.
US4367274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitized organic electron donor bis-benzocarbazole compounds
Assignee: MINING AND MAUFACTURING COMPANY A CORPOF DE
•
Filing: 1981-02-23
•
Granted: 1983-01-04
•
Expires: 2001-02-23
Abstract
Abstract Electron donor compounds for use in electrophotographic constructions must be sensitized to desired regions of the electromagnetic spectrum. Novel bis-benzocarbazole derivatives which can be used as organic electron donor compounds have been found to be sensitized by polyquinoid and polyanthroquinoid dyes.
Inventors
- 👤 Louis M. Leichter
- 👤 Terry J. Sonnonstine
- 👤 John J. Stofko, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:18
CPC Classifications
C; C07; C07D; C07D209/00; C07D209/56; C07D209/80; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
132 words
A spectrally sensitized electrically active donor compound of the formula ##STR11## where X is ##STR12## wherein R 7 and Y are independently selected from the group consisting of aliphatic, aromatic, heterocyclic, and mixed aliphatic-aromatic groups, sensitized by an effective amount of a polyquinoid dye selected from the class consisting of: ##STR13## wherein A is selected from quinoid and anthraquinoid groups, R and R 1 are selected from quinoid and anthraquinoid groups, R 2 is selected from quinoid groups, anthraquinoid groups, and an oxygen atom, R 3 is a quinoid group, and R 4 , R 5 and R 6 are selected from the class consisting of quinoid groups and oxygen atoms with the proviso that at least one of R 4 , R 5 and R 6 must be a quinoid group.
Claim 2
Dependent Claim
132 words
A spectrally sensitized electrically active donor compound of the formula ##STR11## where X is ##STR12## wherein R 7 and Y are independently selected from the group consisting of aliphatic, aromatic, heterocyclic, and mixed aliphatic-aromatic groups, sensitized by an effective amount of a polyquinoid dye selected from the class consisting of: ##STR13## wherein A is selected from quinoid and anthraquinoid groups, R and R 1 are selected from quinoid and anthraquinoid groups, R 2 is selected from quinoid groups, anthraquinoid groups, and an oxygen atom, R 3 is a quinoid group, and R 4 , R 5 and R 6 are selected from the class consisting of quinoid groups and oxygen atoms with the proviso that at least one of R 4 , R 5 and R 6 must be a quinoid group.
Claim 3
Dependent Claim
11 words
The compound of claim 1 wherein Y is an aromatic group.
Claim 4
Dependent Claim
19 words
The compound of claim 1 wherein R 7 is an alkyl group of from 1 to 20 carbon atoms.
Claim 5
Dependent Claim
47 words
The compound of claim 1 wherein Y is an aromatic group, R 7 is selected from the group consisting of an alkyl group of 2 to 20 carbon atoms, phenyl group, naphthyl group, or benzyl group, and the polyquinoid dye is a cyclopropane or cyclobutane polyquinoid dye.
Claim 6
Dependent Claim
20 words
The compound of claim 1 wherein Y is phenyl and R 7 is n-alkyl of 2 to 20 carbon atoms.
Claim 7
Dependent Claim
18 words
An electrically active photoconductive insulating layer comprising a polymeric binder and the spectrally sensitized compound of claim 1.
Claim 8
Dependent Claim
18 words
An electrically active photoconductive insulating layer comprising a polymeric binder and the spectrally sensitized compound of claim 4.
Claim 9
Dependent Claim
11 words
The layer of claim 6 wherein Y is an aromatic group.
Claim 10
Dependent Claim
28 words
The layer of claims 6, 7, or 8 wherein R 7 is an alkyl group of 2 to 20 carbon atoms, phenyl group, naphthyl group or benzyl group.
Claim 11
Dependent Claim
22 words
The layer of claims 6 or 8 wherein Y is phenyl and R 7 is n-alkyl of 2 to 20 carbon atoms.
Claim 12
Dependent Claim
24 words
An electrophotographic element comprising, in sequence, a conductive layer, a charge generating layer, and the photoconductive insulating layer of claims 6, 7, or 8.
References Cited (Backward Citations)
US4134764A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-01-03 | 1986-07-05 | 1987-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-03 | 1990-07-05 | 1991-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-03 | 1994-07-05 | 1995-01-04 | $7700.00 | Window Closed / Lapsed |