US4517272A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrostatic dry toner composition
Assignee: NexPress Solutions LLC
•
Filing: 1983-08-12
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Granted: 1985-05-14
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Expires: 2003-08-12
Abstract
Abstract The hollow character defect in electrostatically transferred dry toner images is reduced by an electrostatic dry toner composition comprising a binder polymer and a low surface energy liquid such as a silicone oil.
Inventors
- 👤 Thomas A. Jadwin
- 👤 Donald S. Rimai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:11
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08773
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
15 words
An electrostatic dry toner composition comprising finely divided polymer particles admixed with a silicone oil.
Claim 2
Dependent Claim
15 words
An electrostatic dry toner composition comprising finely divided polymer particles admixed with a silicone oil.
Claim 3
Dependent Claim
16 words
An electrostatic dry developer composition comprising a carrier and a toner composition according to claim 1.
Claim 4
Dependent Claim
30 words
An electrostatic dry toner composition according to claim 1 wherein a portion of said oil coats the surfaces of said particles and another portion is occluded within individual polymer particles.
Claim 5
Independent Claim
26 words
A method of preparing electrostatic toner particles which comprises melt blending a toner polymer with a silicone oil and thereafter solidifying and pulverizing the resulting blend.
Claim 6
Independent Claim
26 words
A method of preparing electrostatic toner particles which comprises melt blending a toner polymer with a silicone oil and thereafter solidifying and pulverizing the resulting blend.
Claim 7
Dependent Claim
45 words
In a method of imaging wherein an electrostatic latent image is formed on a first surface, is developed with a polymeric toner composition and transferred electrostatically to a second surface, the improvement wherein said toner composition comprises finely divided polymer particles and a silicone oil.
Claim 8
Dependent Claim
45 words
In a method of imaging wherein an electrostatic latent image is formed on a first surface, is developed with a polymeric toner composition and transferred electrostatically to a second surface, the improvement wherein said toner composition comprises finely divided polymer particles and a silicone oil.
Claim 9
Dependent Claim
20 words
A method according to claim 5 wherein the first surface is a photoconductive element and the second surface is paper.
References Cited (Backward Citations)
US2986521A
Cited
US3720617A
Cited
GB1402009A
Cited
GB1402010A
Cited
US4110267A
Cited
US4345015A
Cited
US4155883A
Cited
US4430409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |