US5521042A
Expired / Lapsed
US
⏱️ 0.0 years remaining
1,4-bis(2',2'-diphenylvinyl)benzene derivative and charge transporting material and electrophotographic photoreceptor using the same
Assignee: Takasago International Corp
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Filing: 1994-04-28
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Granted: 1996-05-28
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Expires: 2014-04-28
Abstract
Abstract A 1,4-bis(2',2'-diphenylvinyl)benzene derivative represented by formula (I): <IMAGE> (I) wherein R1 and R2 each represents a different lower alkyl group and Me represents a methyl group, a charge transporting material containing the compound (I), and an electrophotographic photoreceptor comprising a charge transporting layer containing the charge transporting material are disclosed.
Inventors
- 👤 Yoshimasa Matsushima
- 👤 Hiroshi Sugiyama
- 👤 Toshimitsu Hagiwara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 00:58
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/0601; G03G5/0612; G03G5/0614; G03G5/06142; G03G5/06147; G03G5/061473
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
41 words
An electrophotographic photoreceptor comprising a charge transporting layer containing a charge transporting material comprising a 1,4-bis(2',2'-diphenylvinyl)benzene derivative represented by formula (I): ##STR13## wherein R 1 and R 2 each represents a different lower alkyl group and Me represents a methyl group.
Claim 2
Dependent Claim
41 words
An electrophotographic photoreceptor comprising a charge transporting layer containing a charge transporting material comprising a 1,4-bis(2',2'-diphenylvinyl)benzene derivative represented by formula (I): ##STR13## wherein R 1 and R 2 each represents a different lower alkyl group and Me represents a methyl group.
Claim 3
Dependent Claim
20 words
An electrophotographic photoreceptor as in claim 1, wherein the different lower alkyl group has from 1 to 4 carbon atoms.
Claim 4
Dependent Claim
21 words
An electrophotographic photoreceptor as in claim 1, wherein the different lower alkyl group is selected from methyl, ethyl, propyl and n-butyl.
Claim 5
Dependent Claim
21 words
An electrophotographic photoreceptor as in claim 1, wherein R 1 is an ethyl group and R 2 is a propyl group.
Claim 6
Dependent Claim
21 words
An electrophotographic photoreceptor as in claim 1, wherein R 1 is a methyl group and R 2 is a propyl group.
Claim 7
Dependent Claim
21 words
An electrophotographic photoreceptor as in claim 1, wherein R 1 is a methyl group and R 2 is an ethyl group.
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) | 1999-05-28 | 1999-11-27 | 2000-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-05-28 | 2003-11-27 | 2004-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-05-28 | 2007-11-27 | 2008-05-28 | $7700.00 | Window Closed / Lapsed |