US4965157A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic photoconductor and polyolefin derivatives employed in the same photoconductor
Assignee: Ricoh Co Ltd
•
Filing: 1990-09-16
•
Granted: 1990-10-23
•
Expires: 2010-09-16
Abstract
Abstract Polyolefin derivatives, which are useful not only as the photoconductive materials for electrophotography, but also as a charge transporting material employed in a function-separating type photoconductor which uses an organic or inorganic pigment as a charge generating material, and an electrophotographic photoconductor containing at least one of the above polyolefin derivatives in a photoconductive layer thereof, are disclosed.
Inventors
- 👤 Mitsuru Hashimoto
- 👤 Tomoyuki Shimada
- 👤 Nobuo Suzuki
- 👤 Takayuki Sakai
- 👤 Susumu Suzuka
- 👤 Masaomi Sasaki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 15:42
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/06; G03G5/0664; G03G5/0666; G03G5/0672; G03G5/0674
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
116 words
An electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon comprising at least one polyolefin derivative having the formula (I): ##STR282## wherein A represents 9-anthryl group, a substituted or unsubstituted N-substituted carbazolyl group, N-substituted phenothiazinyl group, or ##STR283## wherein Ar represents a substituted or unsubstituted allylene group, and R 1 and R 2 each represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group, R represents hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; m is an integer of 2 to 8; and n is an integer of 0 or 1.
Claim 2
Dependent Claim
116 words
An electrophotographic photoconductor comprising an electroconductive support and a photoconductive layer formed thereon comprising at least one polyolefin derivative having the formula (I): ##STR282## wherein A represents 9-anthryl group, a substituted or unsubstituted N-substituted carbazolyl group, N-substituted phenothiazinyl group, or ##STR283## wherein Ar represents a substituted or unsubstituted allylene group, and R 1 and R 2 each represent a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group, R represents hydrogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aralkyl group or a substituted or unsubstituted aryl group; m is an integer of 2 to 8; and n is an integer of 0 or 1.
Claim 3
Dependent Claim
31 words
The electrophotographic photoconductor as claimed in claim 1, wherein said photoconductive layer comprises a charge generating material dispersed in a charge transporting medium comprising said polyolefin derivative and a binder agent.
Claim 4
Dependent Claim
35 words
The electrophotographic photoconductor as claimed in claim 1, wherein said photoconductive layer comprises a charge generation layer containing a charge generating material, and a charge transport layer containing said polyolefin as a charge transporting material.
Claim 5
Dependent Claim
35 words
The electrophotographic photoconductor as claimed in claim 1, wherein the amount of said polyolefin derivative is in the range of 30 wt. % to 70 wt. % of the entire weight of said photoconductive layer.
Claim 6
Dependent Claim
63 words
The electrophotographic photoconductor as claimed in claim 2, wherein the amount of said polyolefin derivative is in the range of 10 wt. % to 95 wt. % of the entire weight of said photoconductive layer, and the amount of said charge generating material is in the range of 0.1 wt. % to 50 wt. % of the entire weight of said photoconductive layer.
Claim 7
Dependent Claim
64 words
The electrophotographic photoconductor as claimed in claim 2, wherein the amount of said charge generating material is in the range of 10 wt. % to 95 wt. % of the entire weight of said charge generation layer, and the amount of said polyolefin derivative is in the range of 10 wt. % to 95 wt. % of the entire weight of said photoconductive layer.
References Cited (Backward Citations)
US3131060A
Cited
US3770428A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-10-22 | 1994-04-23 | 1994-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-22 | 1998-04-23 | 1998-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-22 | 2002-04-23 | 2002-10-23 | $7700.00 | Window Closed / Lapsed |