US4464452A
Expired / Lapsed
US
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Developer compositions containing diaryl sulfonimides
Assignee: Xerox Corp
•
Filing: 1983-05-02
•
Granted: 1984-08-07
•
Expires: 2003-05-02
Abstract
Abstract Developer composition with a negative charge enhancing additive is disclosed.
Inventors
- 👤 Robert J. Gruber
- 👤 Paul C. Julien
- 👤 Raymond A. Yourd, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:07
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09733; G03G9/09775
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
49 words
A dry negatively charged toner composition comprised of resin particles, pigment particles, and from about 0.1 to about 10 weight percent of a negative charge enhancing additive, of the formula ##STR2## wherein R and R 1 are independently selected from the group consisting of alkyl, halogen, nitro, and hydrogen.
Claim 2
Dependent Claim
49 words
A dry negatively charged toner composition comprised of resin particles, pigment particles, and from about 0.1 to about 10 weight percent of a negative charge enhancing additive, of the formula ##STR2## wherein R and R 1 are independently selected from the group consisting of alkyl, halogen, nitro, and hydrogen.
Claim 3
Dependent Claim
29 words
A toner composition in accordance with claim 1, wherein the alkyl groups contain from about 1 to about 25 carbon atoms, and the halogen is chloride, fluoride, or bromide.
Claim 4
Dependent Claim
15 words
A toner composition in accordance with claim 1, wherein R and R 1 are hydrogen.
Claim 5
Dependent Claim
15 words
A toner composition in accordance with claim 1, wherein R and R 1 are p-methyl.
Claim 6
Dependent Claim
19 words
A toner composition in accordance with claim 1, wherein the resin particles are comprised of a styrene methacrylate copolymer.
Claim 7
Dependent Claim
19 words
A toner composition in accordance with claim 1, wherein the pigment particles are cyan, magenta, yellow, or mixtures thereof.
Claim 8
Dependent Claim
16 words
A toner composition in accordance with claim 6, wherein the cyan pigment is copper tetra-4(octadecyl sulfonomido).
Claim 9
Dependent Claim
14 words
A toner composition in accordance with claim 6, wherein the magenta pigment is 2,9-dimethylquinacridone.
Claim 10
Dependent Claim
15 words
A toner composition in accordance with claim 1, wherein the yellow pigment is 2,5-dimethoxy-4-sulfonanilide phenylazo-4'-chloro-2,5-dimethoxyacetoacetanilide.
Claim 11
Dependent Claim
15 words
A toner composition in accordance with claim 1, wherein the pigment particles are carbon black.
Claim 12
Dependent Claim
30 words
A toner composition in accordance with claim 1, wherein the resin particles are present in an amount of from about 75 percent by weight to about 95 percent by weight.
Claim 13
Dependent Claim
48 words
A developer composition comprised of resin particles, pigment particles, carrier particles, and from about 0.1 percent by weight to about 10 percent by weight of the negative charge enhancing additive of claim 1, wherein R and R 1 are independently selected from alkyl groups, halogen, nitro, and hydrogen.
Claim 14
Dependent Claim
32 words
A developer composition in accordance with claim 12, wherein R and R 1 are alkyl groups containing from about 1 to 25 carbon atoms, and the halogen is chloride, fluoride, or bromide.
Claim 15
Dependent Claim
15 words
A developer composition in accordance with claim 12, wherein R and R 1 are hydrogen.
Claim 16
Dependent Claim
20 words
A developer composition in accordance with claim 12, wherein the resin particles are comprised of a styrene butyl methacrylate co-polymer.
Claim 17
Dependent Claim
28 words
A developer composition in accordance with claim 12, wherein the carrier particles consist of a steel core coated with a terpolymer of styrene, methyl methacrylate, and a silane.
Claim 18
Dependent Claim
15 words
A developer composition in accordance with claim 12, wherein the pigment particles are carbon black.
Claim 19
Dependent Claim
20 words
A developer composition in accordance with claim 10, wherein the pigment particles are cyan, magenta, and yellow, or mixtures thereof.
Claim 20
Dependent Claim
15 words
A developer composition in accordance with claim 18, wherein the cyan pigment is copper tetra-4(octadecylsulfonomido).
Claim 21
Dependent Claim
14 words
A developer composition in accordance with claim 18, wherein the magenta pigment is 2,9-dimethylquinacridone.
Claim 22
Dependent Claim
14 words
A developer composition in accordance with claim 18, wherein the yellow pigment is 2,5-dimethoxy-4-sulfonoanilidephenylazo-4'-chloro-2,5-dimethoxyaceto-acetanilide.
Claim 23
Independent Claim
91 words
A method for developing electrostatic latent images comprising forming a positive electrostatic latent image on an inorganic photoresponsive device, contacting the resulting image with a dry negative charged toner composition comprising resin particles, pigment particles, and from about 0.1 percent by weight to about 10 percent by weight of a negative charge enhancing additive of the formula: ##STR3## wherein R and R 1 are independently selected from the group consisting of alkyl, halogen, nitro and hydrogen, followed by transferring the image to a suitable substrate, and permanently affixing the image thereto.
Claim 24
Independent Claim
91 words
A method for developing electrostatic latent images comprising forming a positive electrostatic latent image on an inorganic photoresponsive device, contacting the resulting image with a dry negative charged toner composition comprising resin particles, pigment particles, and from about 0.1 percent by weight to about 10 percent by weight of a negative charge enhancing additive of the formula: ##STR3## wherein R and R 1 are independently selected from the group consisting of alkyl, halogen, nitro and hydrogen, followed by transferring the image to a suitable substrate, and permanently affixing the image thereto.
Claim 25
Dependent Claim
29 words
A method for imaging in accordance with claim 22, when the pigment particles are comprised of cyan, magenta, and yellow pigments or mixtures thereof, and there results color images.
Claim 26
Dependent Claim
16 words
A method of imaging in accordance with claim 22, wherein R and R 1 are hydrogen.
Claim 27
Dependent Claim
31 words
A method of imaging in accordance with claim 22, wherein there is added thereto carrier particles consisting of a steel core coated with a terpolymer of styrene, methacrylate, and a silane.
Claim 28
Dependent Claim
22 words
A method of imaging in accordance with claim 22, wherein the resin particles are comprised of a styrene butyl methacrylate copolymer resin.
Claim 29
Dependent Claim
16 words
A toner composition in accordance with claim 1, wherein the pigment particles are comprised of magnetite.
Claim 30
Dependent Claim
17 words
A toner composition in accordance with claim 27, wherein the magnetite is a mixture of iron oxides.
Claim 31
Dependent Claim
19 words
A toner composition in accordance with claim 1, wherein the pigment particles are comprised of carbon black and magnetite.
Claim 32
Dependent Claim
15 words
A developer composition in accordance with claim 12, wherein R and R 1 are p-methyl.
Claim 33
Dependent Claim
16 words
A method of imaging in accordance with claim 22, wherein R and R 1 are p-methyl.
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) | 1987-08-07 | 1988-02-06 | 1988-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-08-07 | 1992-02-06 | 1992-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-08-07 | 1996-02-06 | 1996-08-07 | $7700.00 | Window Closed / Lapsed |