Patent US4840834A successfully refreshed from Google Patents.
US4840834A
Expired / Lapsed
US
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Electrostatic recording material
Assignee: New Oji Paper Co Ltd
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Filing: 1987-03-19
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Granted: 1989-06-20
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Expires: 2007-03-19
Abstract
Abstract An electrostatic recording material which comprises a support coated in sequence with a conductive layer and a recording layer composed of a dielectric resin and a pigment, wherein at least a part of the pigment component in said recording layer is made of an aluminum hydroxide powder having an average particle size of 1-20 μm is disclosed.
Inventors
- 👤 Yasuharu Onogi
- 👤 Akinori Oka
- 👤 Masakatsu Nagatomo
- 👤 Takumi Kondo
- 👤 Kouji Mizumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:10
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/0202; G03G5/0217; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24802; Y10T428/24934; Y10T428/25; Y10T428/256; Y10T428/257; Y10T428/29; Y10T428/2982; Y10T428/2991; Y10T428/2993; Y10T428/2995; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31895; Y10T428/31899; Y10T428/31902; Y10T428/31906
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
73 words
An electrostatic recording material which comprises a support coated in sequence with a conductive layer and a recording layer composed of a dielectric resin and a pigment, wherein the ratio of dielectric resin to pigment is in the range of from 5:5 to 8L2, and wherein at least 2 percent of the pigment component in said recording layer is made of an aluminum hydroxide powder having an average particle size of 1-20 μm.
Claim 2
Dependent Claim
73 words
An electrostatic recording material which comprises a support coated in sequence with a conductive layer and a recording layer composed of a dielectric resin and a pigment, wherein the ratio of dielectric resin to pigment is in the range of from 5:5 to 8L2, and wherein at least 2 percent of the pigment component in said recording layer is made of an aluminum hydroxide powder having an average particle size of 1-20 μm.
Claim 3
Dependent Claim
33 words
An electrostatic recording material according to claim 1 wherein the surfaces of the particles of said aluminum hydroxide powder have been treated with an aliphatic acid or a titanium- or silane-based coupling agent.
Claim 4
Dependent Claim
30 words
An electrostatic recording material according to claim 1, wherein the average particle size of the aluminum hydroxide is larger than that of any other pigment present in the recording layer.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-19 | 1992-12-19 | 1993-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-19 | 1996-12-19 | 1997-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-19 | 2000-12-19 | 2001-06-20 | $7700.00 | Window Closed / Lapsed |