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Patent US3978029A successfully refreshed from Google Patents.
US3978029A
Expired / Lapsed
US
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Photoconductive compositions and imaging members and methods employing same
Assignee: Xerox Corp
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Filing: 1974-02-20
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Granted: 1976-08-31
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Expires: 1994-02-20
Abstract
Abstract Photoconductive composition comprising a carbazole functional polymer wherein at least 0.1 percent of said carbazole function groups have the following structural formula ##SPC1## wherein X is a structural unit of said polymer; R is hydrogen; an aliphatic hydrocarbon radical having from 1 - 10 carbon atoms; phenyl; or substituted phenyl, said phenyl substituents being capable of contribution of electrons to relatively electron deficient centers with the structural unit. Materials of the above structural formula can be readily polymerized or copolymerized with other addition polymers. These polymer compositions are useful in preparation of photoconductive insulating layers for electrophotography.
Inventors
- 👤 William W. Limburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:49
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/07; G03G5/071; G03G5/072; G03G5/073; C; C08; C08F; C08F8/00; C08G; C08G77/00; C08G77/04; C08G77/22; C08G77/26; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31855
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
A photoconductive polymer of the formula: ##SPC4## wherein X is a structural unit of the backbone of the photoconductive polymer; R is an aliphatic hydrocarbon radical having anywhere from 1 to 10 carbon atoms, phenyl or substituted phenyl, said phenyl substituent being capable of contribution of electrons to relatively electron deficient centers on the carbazyl functional group; n is the total number of carbazyl functional groups pendant from the backbone of the photoconductive polymer; and m is at lest 0.1 percent of the total number of carbazyl functional groups pendant from the backbone of the photoconductive polymer.
Claim 2
Dependent Claim
97 words
A photoconductive polymer of the formula: ##SPC4## wherein X is a structural unit of the backbone of the photoconductive polymer; R is an aliphatic hydrocarbon radical having anywhere from 1 to 10 carbon atoms, phenyl or substituted phenyl, said phenyl substituent being capable of contribution of electrons to relatively electron deficient centers on the carbazyl functional group; n is the total number of carbazyl functional groups pendant from the backbone of the photoconductive polymer; and m is at lest 0.1 percent of the total number of carbazyl functional groups pendant from the backbone of the photoconductive polymer.
Claim 3
Dependent Claim
21 words
The photoconductive polymer of claim 1 wherein at least 0.1 to about 50 percent of said carbazyl functional groups are tricyanovinylated.
Claim 4
Dependent Claim
21 words
The photoconductive polymer of claim 1 wherein at least 0.1 to about 35 percent of said carbazyl functional groups are tricyanovinylated.
Claim 5
Dependent Claim
14 words
The photoconductive polymer of claim 1 wherein the copolymer comprises structural units of 6-tricyanovinyl-N-ethyl-2-vinylcarbazole.
Claim 6
Dependent Claim
14 words
The photoconductive polymer of claim 1 wherein the copolymer comprises structural units of 6-tricyanovinyl-N-ethyl-3vinylcarbazole.
Claim 7
Dependent Claim
16 words
The photoconductive polymer of claim 1 wherein the copolymer comprises structural units from 6-tricyanovinyl-N-ethyl-2-vinylcarbazole and 6-tricyanovinyl-N-ethyl-3-vinylcarbazole
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) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |