US4675262A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multilayer electrophotographic photosensitive element having charge transport layer containing powdered material having specified refractive index
Assignee: Canon Inc
•
Filing: 1986-01-10
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Granted: 1987-06-23
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Expires: 2006-01-10
Abstract
Abstract An electrophotographic photosensitive member comprises a charge generation layer and a charge transport layer, the charge transport layer containing powders having a refractive index different from that of the charge transport layer excluding the powders.
Inventors
- 👤 Shigemori Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:03
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G5/05; G03G5/0503; G03G5/0507; G03G5/043; G03G5/047; Y; Y10; Y10S; Y10S430/00; Y10S430/146
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
38 words
An electrophotographic photosensitive member which comprises a charge generation layer and a charge transport layer, the charge transport layer containing powder material having a refractive index different from that of the charge transport layer excluding the powder material.
Claim 2
Dependent Claim
38 words
An electrophotographic photosensitive member which comprises a charge generation layer and a charge transport layer, the charge transport layer containing powder material having a refractive index different from that of the charge transport layer excluding the powder material.
Claim 3
Dependent Claim
33 words
The electrophotographic photosensitive member according to claim 1 in which the difference in refractive index between the charge transport layer excluding the powder material and containing the powder material is 0.01 or more.
Claim 4
Dependent Claim
19 words
The electrophotographic photosensitive member according to claim 2 in which the difference in refractive index is 0.11 or more.
Claim 5
Dependent Claim
25 words
The electrophotographic photosensitive member according to claim 1 in which the charge transport layer comprises a charge transporting material, a resin and the powder material.
Claim 6
Dependent Claim
53 words
An electrophotographic method which comprises charging an electrophotographic photosensitive member and irradiating with a laser beam, the electrophotographic photosensitive member comprising a charge generation layer and a charge transport layer, the charge transport layer containing powder material having a refractive index different from that of the charge transport layer excluding the powder material.
Claim 7
Dependent Claim
53 words
An electrophotographic method which comprises charging an electrophotographic photosensitive member and irradiating with a laser beam, the electrophotographic photosensitive member comprising a charge generation layer and a charge transport layer, the charge transport layer containing powder material having a refractive index different from that of the charge transport layer excluding the powder material.
Claim 8
Dependent Claim
15 words
The electrophotographic method according to claim 5 in which the laser is a semiconductor laser.
References Cited (Backward Citations)
US4489148A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-06-22 | 1990-12-22 | 1991-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-22 | 1994-12-22 | 1995-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-22 | 1998-12-22 | 1999-06-23 | $7700.00 | Window Closed / Lapsed |