US4886846A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic diolefinic compounds, aromatic diethyl compounds and electrophotographic photoconductors comprising one aromatic diethyl compound
Assignee: Ricoh Co Ltd
•
Filing: 1988-03-21
•
Granted: 1989-12-12
•
Expires: 2008-03-21
Abstract
Abstract Aromatic diolefinic compounds including 1,4-divinylbenzene derivatives, which are useful not only as organic photoconductive materials for electrophotography, but also as intermediates for producing diethyl aromatic compounds which are also useful as organic photoconductive materials for electrophotography, the aromatic diethyl compounds, an electrophotographic photoconductor containing any of the above aromatic diethyl compounds in a photosensitve layer thereof, and a charge transporting medium containing any of the aromatic diethyl compound are disclosed.
Inventors
- 👤 Tomoyuki Shimada
- 👤 Masaomi Sasaki
- 👤 Mitsuru Hashimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:02
CPC Classifications
C; C07; C07C; C07C255/00; C07D; C07D307/00; C07D307/77; C07D307/78; C07D307/86; C07D333/00; C07D333/02; C07D333/04; C07D333/26; C07D333/30; C07D333/36; G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06144; G03G5/0622; G03G5/0624; G03G5/0627; G03G5/0644; G03G5/0661
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A charge transporting medium comprising an aromatic diethyl compound having formula (II-1) and a binder agent: ##STR2100## wherein A represents an N-substituted carbazolyl group or ##STR2101## wherein Ar 1 represents an unsubstituted or substituted aromatic hydrocarbon group or a heterocyclic group, and R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group; and Ar represents an unsubstituted or substituted aromatic hydrocarbon group.
Claim 2
Dependent Claim
72 words
A charge transporting medium comprising an aromatic diethyl compound having formula (II-1) and a binder agent: ##STR2100## wherein A represents an N-substituted carbazolyl group or ##STR2101## wherein Ar 1 represents an unsubstituted or substituted aromatic hydrocarbon group or a heterocyclic group, and R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group; and Ar represents an unsubstituted or substituted aromatic hydrocarbon group.
Claim 3
Dependent Claim
68 words
The charge transporting medium as claimed in claim 1, wherein said aromatic diethyl compound is a diethylbenzene derivative having the formula (II-2) ##STR2102## wherein A represents an N-substituted carbazolyl group or ##STR2103## wherein Ar 1 represents an unsubstituted or substituted aromatic hydrocarbon group or a heterocyclic group, and R 1 and R 2 each represent an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group.
Claim 4
Dependent Claim
57 words
The charge transporting medium as claimed in claim 1, wherein said aromatic diethyl compound is a diethylbenzene derivative having the formula (II-3): ##STR2104## wherein R 1 , R 2 , R 3 and R 4 each represent an alkyl group having 1 to 5 carbon atoms, an alkoxyl group having 1 to 5 carbon atoms, or halogen.
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) | 1992-12-11 | 1993-06-12 | 1993-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-11 | 1997-06-12 | 1997-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-11 | 2001-06-12 | 2001-12-12 | $7700.00 | Window Closed / Lapsed |