US4416963A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically-conductive support for electrophotographic light-sensitive medium
Assignee: Fujifilm Holdings Corp
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Filing: 1981-04-13
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Granted: 1983-11-22
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Expires: 2001-04-13
Abstract
Abstract An electrically-conductive support for an electrophotographic medium, comprising a support and an electrically-conductive layer provided on the support is disclosed. The electrically-conductive layer comprises a binder and electrically-conductive metal oxide fine particles having an average grain size of 0.5μ or less, dispersed in the binder.
Inventors
- 👤 Masaaki Takimoto
- 👤 Takashi Saida
- 👤 Masataka Murata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 18:06
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/10; G03G5/104; G03G5/02; G03G5/04; G03G5/09; Y; Y10; Y10S; Y10S430/00; Y10S430/151; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/257
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
134 words
An electrically-conductive support for use in an electrophotographic medium, comprising: a support; and an electrically-conductive layer provided on the support wherein the electrically-conductive layer comprises a binder and electrically conductive metal oxide fine particles having an average grain size of 0.5μ or less and a volume resistivity of 10 6 Ω-cm or less, dispersed in a binder, wherein said electrically-conductive metal oxide fine particles are selected from the group consisting of crystalline metal oxide particles and metal oxide particles containing an oxygen deficiency or small amounts of hetero atoms capable of forming a donor for the metal oxide used, wherein said electrically-conductive support is transparent such that it has a transmittance of light, having a wavelength range including visible light, of about 50% or more, and a light-scattering efficiency of about 50% or less.
Claim 2
Dependent Claim
134 words
An electrically-conductive support for use in an electrophotographic medium, comprising: a support; and an electrically-conductive layer provided on the support wherein the electrically-conductive layer comprises a binder and electrically conductive metal oxide fine particles having an average grain size of 0.5μ or less and a volume resistivity of 10 6 Ω-cm or less, dispersed in a binder, wherein said electrically-conductive metal oxide fine particles are selected from the group consisting of crystalline metal oxide particles and metal oxide particles containing an oxygen deficiency or small amounts of hetero atoms capable of forming a donor for the metal oxide used, wherein said electrically-conductive support is transparent such that it has a transmittance of light, having a wavelength range including visible light, of about 50% or more, and a light-scattering efficiency of about 50% or less.
Claim 3
Dependent Claim
49 words
An electrically-conductive support as in claim 1, wherein said metal oxide is selected from the group consisting of ZnO, TiO 2 , SnO 2 , Al 2 O 3 , In 2 O 3 , SiO 2 , MgO, BaO, MoO 3 , ZrO 2 and composite oxides thereof.
Claim 4
Dependent Claim
73 words
An electrically-conductive support as in claim 1, wherein said metal oxide is one selected from the group consiting of ZnO, TiO 2 , SnO 2 , Al 2 O 3 , In 2 O 3 , SiO 2 , MgO, BaO, MoO 3 , ZrO 2 and composite oxides thereof, modified by introduction of an oxygen deficiency or small amounts of hetero atoms capable of forming a donor for the metal oxide used.
Claim 5
Dependent Claim
14 words
An electrically-conductive support as in claim 1, wherein said metal oxide contains an oxygen-deficiency.
Claim 6
Dependent Claim
28 words
An electrically-conductive support as in claim 1, wherein said electrically-conductive layer has a surface resistivity of 10 10 Ω or less at 25° C. under 25% relative humidity.
Claim 7
Dependent Claim
27 words
An electrically-conductive support as in claim 1, wherein said fine particles are contained in an amount of 0.05 to 20 g per square meter of said support.
References Cited (Backward Citations)
US2624240A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-21 | 1987-05-23 | 1987-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-21 | 1991-05-23 | 1991-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-21 | 1995-05-23 | 1995-11-22 | $7700.00 | Window Closed / Lapsed |