US4296192A
Expired / Lapsed
US
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Electrostatographic toner composition
Assignee: Xerox Corp
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Filing: 1979-07-02
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Granted: 1981-10-20
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Expires: 1999-07-02
Abstract
Abstract An electrostatographic toner composition including a colorant and polyether polymer of a dihydric phenol and an alkylene ether glycol.
Inventors
- 👤 Robert J. Gruber
- 👤 Steven B. Bolte
- 👤 John F. Knapp
- 👤 Dale R. Ims
- 👤 Richard B. Lewis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:03
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/62; C08G59/621; C08L; C08L71/00; C08L71/02; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08759; C08G2650/00; C08G2650/28; C08G2650/56; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
77 words
An improved electrostatographic toner composition comprised of a resin, and a colorant, the resin consisting essentially of a polyether polymer resulting from the reaction product of 50 mol percent of a dihydric phenol, containing about 10 to 25 mol percent of a polyalkylene ether glycol selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, di-1,2-polylene glycol, tri-1,2-propylene glycol, and tetra 1,2-propylene glycol, and about 40 mol percent to about 25 mol percent of epichlorohydrin.
Claim 2
Dependent Claim
77 words
An improved electrostatographic toner composition comprised of a resin, and a colorant, the resin consisting essentially of a polyether polymer resulting from the reaction product of 50 mol percent of a dihydric phenol, containing about 10 to 25 mol percent of a polyalkylene ether glycol selected from the group consisting of diethylene glycol, triethylene glycol, tetraethylene glycol, di-1,2-polylene glycol, tri-1,2-propylene glycol, and tetra 1,2-propylene glycol, and about 40 mol percent to about 25 mol percent of epichlorohydrin.
Claim 3
Dependent Claim
28 words
An improved electrostatographic toner composition in accordance with claim 1 wherein the dihydric phenol is bisphenol A, and the polyalkylene ether glycol is diethylene glycol or tetraethylene glycol.
Claim 4
Dependent Claim
42 words
An improved electrostatographic toner composition in accordance with claim 1 wherein the resin is a copolymer of styrene and n-butyl methacrylate, the colorant is carbon black, the dihydric phenol is bisphenol-A and the polyalkylene ether glycol is diethylene glycol or tetraethylene glycol.
Claim 5
Dependent Claim
38 words
An improved toner composition in accordance with claim 1 wherein 14 mol percent to 21 mol percent of the dihydric phenol is present, and from about 36 to 29 mol percent of the polyalkylene ether glycol is present.
Claim 6
Dependent Claim
29 words
An improved electrostatographic toner composition in accordance with claim 1 wherein the polyether polymer is a polyglycidyl ether, resulting from the reaction product of bisphenol-A, tetraethylene glycol, and epichlorohydrin.
Claim 7
Dependent Claim
29 words
An improved electrostatographic toner composition in accordance with claim 1 wherein the polyether polymer is a polyglycidyl ether, resulting from the reaction product of bisphenol-A, diethylene glycol, and epichlorohydrin.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-19 | 1985-04-20 | 1985-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-19 | 1989-04-20 | 1989-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-19 | 1993-04-20 | 1993-10-20 | $7700.00 | Window Closed / Lapsed |