Patent US4474866A successfully refreshed from Google Patents.
US4474866A
Expired / Lapsed
US
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Developer composition containing superparamagnetic polymers
Assignee: Xerox Corp
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Filing: 1983-09-28
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Granted: 1984-10-02
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Expires: 2003-09-28
Abstract
Abstract A color magnetic single component toner composition possessing a magnetic saturation moment of from about 2 emu/gram to about 30 emu/gram comprised of toner resin particles, pigment particles, and a low optical density superparamagnetic polymer comprised of an ion exchange resin containing trapped within its matrices a magnetic component species.
Inventors
- 👤 Ronald F. Ziolo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:59
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/083; G03G9/0831; G03G9/0833; G03G9/0839; G03G9/087; G03G9/08702; G03G9/08706; G03G9/08784; G03G9/08797; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/104
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
49 words
A color magnetic single component toner composition possessing a magnetic saturation moment of from about 2 emu/gram to about 30 emu/gram comprised of toner resin particles, pigment particles, and a low optical density superparamagnetic polymer comprised of an ion exchange resin containing trapped within its matrices a magnetic material.
Claim 2
Dependent Claim
49 words
A color magnetic single component toner composition possessing a magnetic saturation moment of from about 2 emu/gram to about 30 emu/gram comprised of toner resin particles, pigment particles, and a low optical density superparamagnetic polymer comprised of an ion exchange resin containing trapped within its matrices a magnetic material.
Claim 3
Dependent Claim
17 words
A toner composition in accordance with claim 1 wherein the ion exchange resin is a sulfonated polystyrene.
Claim 4
Dependent Claim
25 words
A toner composition in accordance with claim 1 wherein the ion exchange resin is a sulfonated polystyrene, and the magnetic material is an iron oxide.
Claim 5
Dependent Claim
16 words
A toner composition in accordance with claim 1 wherein the magnetic material is gamma iron oxide.
Claim 6
Dependent Claim
35 words
A toner composition in accordance with claim 1 wherein the magnetic material is contained in the ion exchange resin in an amount of from about 1 percent by weight to about 10 percent by weight.
Claim 7
Dependent Claim
21 words
A toner composition in accordance with claim 1 wherein the resin particles are selected from styrene methacrylate polymers, or polyester compositions.
Claim 8
Dependent Claim
17 words
A toner composition in accordance with claim 6 wherein the styrene methacrylate polymers are styrene n-butylmethacrylate copolymers.
Claim 9
Dependent Claim
24 words
A toner composition in accordance with claim 1 wherein the pigment particles are selected from red, blue, green, magenta, cyan, yellow, or mixtures thereof.
Claim 10
Dependent Claim
77 words
A toner composition in accordance with claim 1 wherein the resin particles are present in an amount of from about 90 percent by weight to about 10 percent by weight, the color pigment particles are present in an amount of from about 1 percent by weight to about 10 percent by weight, and the low optical density superparamagnetic polymers are present in an amount of from about 10 percent by weight to about 90 percent by weight.
Claim 11
Dependent Claim
35 words
A method of imaging which comprises generation a latent magnetic image, or a latent electrostatic image, developing the image with the toner composition of claim 1, and subsequently transferring the image to a suitable substrate.
Claim 12
Dependent Claim
25 words
A method of imaging in accordance with claim 10 wherein the ion exchange resin is sulfonated polystyrene, and the magnetic material is an iron oxide.
Claim 13
Dependent Claim
32 words
A method of imaging in accordance with claim 10 wherein the magnetic material is contained in the ion exchange resin in an amount of from about 1 percent to about 10 percent.
Claim 14
Dependent Claim
25 words
A method of imaging in accordance with claim 10 wherein the pigment particles are selected from red, blue, green, magenta, cyan, yellow, or mixtures thereof.
Claim 15
Dependent Claim
22 words
A method of imaging in accordance with claim 10 wherein the resin particles are selected from styrene methacrylate polymers, or polyester compositions.
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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) | 1987-10-02 | 1988-04-02 | 1988-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-02 | 1992-04-02 | 1992-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-02 | 1996-04-02 | 1996-10-02 | $7700.00 | Window Closed / Lapsed |