Patent US4816365A successfully refreshed from Google Patents.
US4816365A
Expired / Lapsed
US
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Electrostatic recording dry toner
Assignee: Nippon Paint Co Ltd
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Filing: 1986-05-28
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Granted: 1989-03-28
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Expires: 2006-05-28
Abstract
Abstract An electrostatic recording dry toner made up of a uniform mixture of (A) precolored resin particles consisting essentially of thermoplastic resin and colorant and having an average size of 5 to 15 mu , (B) spherical resin particles having an average size of 0.01 to 2.00 mu and having on their surfaces a charge controlling agent or cationic or anionic resin, and (C) silica particles having an average size of 1 mu or less, is provided. The present dry toner can produce copies with high picture qualities at a higher transfer ratio even in a long run continuous reproduction.
Inventors
- 👤 Katsukiyo Ishikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 11:00
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/0819; G03G9/097
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
76 words
An electrostatic recording dry toner made up of a uniform mixture of (A) precolored resin particles consisting essentially of thermoplastic resin and colorant and having an average size of 5 to 15μ. (B) spherical resin particles having an average size of 0.01 to 2.00μ and having on the respective particle surface a coating layer of a charge controlling agent or cationic or anionic resin, and (C) silica particles having an average size of 1μ or less.
Claim 2
Dependent Claim
76 words
An electrostatic recording dry toner made up of a uniform mixture of (A) precolored resin particles consisting essentially of thermoplastic resin and colorant and having an average size of 5 to 15μ. (B) spherical resin particles having an average size of 0.01 to 2.00μ and having on the respective particle surface a coating layer of a charge controlling agent or cationic or anionic resin, and (C) silica particles having an average size of 1μ or less.
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) | 1992-03-27 | 1992-09-26 | 1993-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-27 | 1996-09-26 | 1997-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-27 | 2000-09-26 | 2001-03-28 | $7700.00 | Window Closed / Lapsed |