US4681829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single component red developer compositions
Assignee: Xerox Corp
•
Filing: 1986-09-02
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Granted: 1987-07-21
•
Expires: 2006-09-02
Abstract
Abstract A positively charged single component toner composition comprised of resin particles, pigment particles selected from the group consisting of substituted perylenes and monoazo pigments, and a charge enhancing additive. Further, there can be added to the toner composition additive particles such as colloidal silica and low molecular weight waxes.
Inventors
- 👤 Bernard Grushkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 23:47
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0908; G03G9/091; G03G9/097; G03G9/09733
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
29 words
A positively charged single component toner composition comprised of resin particles, pigment particles selected from the group consisting of substituted perylenes and monoazo pigments, and a charge enhancing additive.
Claim 2
Dependent Claim
29 words
A positively charged single component toner composition comprised of resin particles, pigment particles selected from the group consisting of substituted perylenes and monoazo pigments, and a charge enhancing additive.
Claim 3
Dependent Claim
30 words
A positively charged toner composition in accordance with claim 1 wherein the pigments are selected from the group consisting of Pigment Red 149, Pigment Red 190, and Pigment Red 224.
Claim 4
Dependent Claim
33 words
A toner composition in accordance with claim 1 wherein the charge enhancing additive is selected from the group consisting of alkyl pyridinium halides, organic sulfates, organic sulfonates, and distearyl dimethyl ammonium methyl sulfate.
Claim 5
Dependent Claim
28 words
A toner composition in accordance with claim 3 wherein the pigments are selected from the group consisting of Pigment Red 149, Pigment Red 190, and Pigment Red 224.
Claim 6
Dependent Claim
22 words
A toner composition in accordance with claim 1 wherein the resin particles are selected from styrene acrylates, styrene methacrylates, and styrene butadienes.
Claim 7
Dependent Claim
15 words
A toner composition in accordance with claim 1 further including therein or thereon additive particles.
Claim 8
Dependent Claim
17 words
A toner composition in accordance with claim 6 wherein the additive particles are comprised of colloidal silicas.
Claim 9
Dependent Claim
31 words
A toner composition in accordance with claim 1 wherein the pigments are selected from the group consisting of Pigment Red 17, Pigment Red 22, Pigment Red 170, and Pigment Red 112.
Claim 10
Dependent Claim
26 words
A toner composition in accordance with claim 1 wherein the resin particles are selected from a group consisting of styrene acrylates, styrene methacrylates, and styrene butadienes.
Claim 11
Dependent Claim
34 words
A toner composition in accordance with claim 1 wherein the charge enhancing additive is selected from the group consisting of alkyl pyridinium halides, distearyl dimethyl ammonium methyl sulfate, and stearyl phenethyl dimethyl ammonium tosylate.
Claim 12
Dependent Claim
25 words
A toner composition in accordance with claim 1 wherein the charge thereon is from about 15 microcoulombs per gram to about 35 microcoulombs per gram.
Claim 13
Dependent Claim
24 words
A toner composition in accordance with claim 1 further including therein a wax with a molecular weight of from about 1,000 to about 6,000.
Claim 14
Dependent Claim
22 words
A toner composition in accordance with claim 12 wherein the wax is selected from the group consisting of polyethylene, polypropylene, or poly(ethylene-co-propylene).
Claim 15
Dependent Claim
14 words
A toner composition in accordance with claim 1 wherein the pigment is 2-naphthalenol, 1-[2-chloro-4-nitrophenyl]azo.
Claim 16
Dependent Claim
15 words
A toner composition in accordance with claim 1 wherein the pigment is anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H, 9H)-tetrone, 2,9-bis(4-ethoxyphenyl).
Claim 17
Dependent Claim
16 words
A toner composition in accordance with claim 1 wherein the red pigment is anthra[2,1,9-def:6,5,10-d'e'f']diisoquinoline-1,3,8,10(2H, 9H)-tetrone, 2,9-dimethyl.
Claim 18
Dependent Claim
20 words
A toner composition in accordance with claim 1 wherein the red pigment is 3,4,9,10-perylene tetra carboxylic acid condensed with p-phenylazoaniline.
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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) | 1990-07-20 | 1991-01-19 | 1991-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-07-20 | 1995-01-19 | 1995-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-07-20 | 1999-01-19 | 1999-07-21 | $7700.00 | Window Closed / Lapsed |