Patent US4299898A successfully refreshed from Google Patents.
US4299898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Positively charged toners containing quaternary ammonium salts attached to acrylate polymers
Assignee: Xerox Corp
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Filing: 1979-05-03
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Granted: 1981-11-10
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Expires: 1999-05-03
Abstract
Abstract Disclosed are toners comprised of a colorant or pigment in a resin of an acrylate polymer of the following typical formula: ##STR1## wherein R 1 and R 3 are independently selected from hydrogen, alkyl, or substituted alkyl radicals, R 2 is independently selected from alkyl, aryl, substituted alkyl, substituted aryl radicals and R 4 , R 5 and R 6 are independently selected from hydrogen, alkyl, aryl, substituted alkyl, and substituted aryl; radicals x is an anion, n is a number of from 1 to about 20 and w, y and z are numbers of from 20 to about 1,400, or ##STR2## wherein R 1 is independently selected from hydrogen, alkyl or substituted alkyl radicals; R 2 is alkyl, aryl, substituted alkyl, or substituted aryl radicals; R 3 , and R 4 are independently selected from hydrogen, alkyl, aryl, substituted alkyl or substituted aryl radicals, and y and z are numbers of from 20 to about 1,400.
Inventors
- 👤 Meurig W. Williams
- 👤 Christoper J. AuClair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:32
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08726; G03G9/08728; G03G9/08706; G03G9/08742; G03G9/08768; G03G9/08784; G03G9/08791; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
44 words
A dry developer composition comprised of 94 percent by weight of a terpolymer resin of styrene, n-butylmethacrylate, and dimethyl amino ethyl methacrylate hydrochloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a perfluoro-alkoxy fluoropolymer.
Claim 2
Dependent Claim
44 words
A dry developer composition comprised of 94 percent by weight of a terpolymer resin of styrene, n-butylmethacrylate, and dimethyl amino ethyl methacrylate hydrochloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a perfluoro-alkoxy fluoropolymer.
Claim 3
Dependent Claim
51 words
A dry developer composition in accordance with claim 1 wherein the styrene is present in an amount of 47 percent by weight, the n-butylmethacrylate is present in an amount of 50 percent by weight, and the dimethyl amino ethyl methacrylate hydrochloride is present in an amount of 3 percent by weight.
Claim 4
Dependent Claim
43 words
A dry developer composition comprised of a 94 percent by weight of a terpolymer of styrene, n-butylmethacrylate, and dially-dimethyl ammonium chloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a vinylidene fluoride resin.
Claim 5
Dependent Claim
43 words
A dry developer composition comprised of a 94 percent by weight of a terpolymer of styrene, n-butylmethacrylate, and dially-dimethyl ammonium chloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a vinylidene fluoride resin.
Claim 6
Dependent Claim
49 words
A dry developer composition in accordance with claim 3 wherein the styrene is present in an amount of 47 percent by weight, the n-butylmethacrylate is present in an amount of 50 percent by weight, and the dially-dimethyl ammonium chloride is present in an amount of 3 percent by weight.
Claim 7
Dependent Claim
42 words
A dry developer composition comprised of 94 percent by weight of a terpolymer of styrene, n-butylmethacrylate, and vinyl benzyl trimethylammonium chloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a perfluoro-alkoxy fluoro-polymer.
Claim 8
Dependent Claim
42 words
A dry developer composition comprised of 94 percent by weight of a terpolymer of styrene, n-butylmethacrylate, and vinyl benzyl trimethylammonium chloride, 6 percent by weight of carbon black, and a carrier material consisting of a steel core coated with a perfluoro-alkoxy fluoro-polymer.
Claim 9
Dependent Claim
50 words
A dry developer composition in accordance with claim 5 wherein the styrene is present in an amount of 40 percent by weight, the n-butylmethacrylate is present in an amount of 58 percent by weight, and the vinyl benzyl trimethylammonium chloride is present in an amount of 2 percent by weight.
Claim 10
Dependent Claim
56 words
A method for developing images in an electrophotographic imaging system which comprises forming an electrostatic latent image on a photoreceptor which has been charged negatively, contacting the image with the developing composition of claim 1 or claim 2, followed by transferring the developed image to a suitable substrate and permanently affixing the image thereto by heat.
Claim 11
Dependent Claim
56 words
A method for developing images in an electrophotographic imaging system which comprises forming an electrostatic latent image on a photoreceptor which has been charged negatively, contacting the image with the developing composition of claim 3 or claim 4 followed by transferring the developed image to a suitable substrate, and permanently affixing the image thereto by heat.
Claim 12
Dependent Claim
56 words
A method for developing images in an electrophotographic imaging system which comprises forming an electrostatic latent image on a photoreceptor which has been charged negatively, contacting the image with the developing composition of claim 5 or claim 6 followed by transferring the developed image to a suitable substrate and permanently affixing the image thereto by heat.
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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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |