US3844815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Foron yellow as a toner colorant
Assignee: Xerox Corp
•
Filing: 1972-12-18
•
Granted: 1974-10-29
•
Expires: 1992-12-18
Abstract
Abstract A dye colorant for use in electrophotography as a toner material is disclosed. Such dye toner systems are found to have excellent tinctorial strength and triboelectric properties among others, which render them extremely suitable for use in electrophotographic imaging processes. These toners alone and in combination with carriers as developers as employed in electrophotographic processes are also disclosed.
Inventors
- 👤 R Parent
- 👤 J Brado
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:28
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/10; G03G9/113; G03G9/1132; G03G9/1133; G03G9/09; G03G9/0906
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
34 words
AN ELECTROSTATOGRAPHIC DEVELOPER COMPOSITION COMPRISING A CARRIER, A RESIN TONE AND A DYE COLORANT, SAID DYE COLORANT BEING SUBSTANTIALLY DISPRESED THROUGHOUT SAID TONER AND SAID DYE COLORANT COMPRISING A COMPOUND SATISFYING THE FOLLOWING FORMULA:
Claim 2
Dependent Claim
34 words
AN ELECTROSTATOGRAPHIC DEVELOPER COMPOSITION COMPRISING A CARRIER, A RESIN TONE AND A DYE COLORANT, SAID DYE COLORANT BEING SUBSTANTIALLY DISPRESED THROUGHOUT SAID TONER AND SAID DYE COLORANT COMPRISING A COMPOUND SATISFYING THE FOLLOWING FORMULA:
Claim 3
Dependent Claim
26 words
The composition as defined in claim 1 wherein said resin is a member selected from Styrenebutyl methacrylate copolymers, styrene-vinyltoluene copolymers, styrene-acrylate copolymers, or poly styrene resins.
Claim 4
Dependent Claim
13 words
The composition as defined in claim 1 wherein said resin is substantially transparent.
Claim 5
Dependent Claim
25 words
The composition as defined in claim 1 wherein said resin comprises a polymeric esterification product of a dicarboxylic acid and a diol comprising a diphenol.
Claim 6
Dependent Claim
15 words
The composition as defined in claim 1 wherein said resin is a styrene-butyl methacrylate copolymer.
Claim 7
Dependent Claim
17 words
The composition as defined in claim 1 wherein said carrier is a methyl terpolymer coated carrier bead.
Claim 8
Dependent Claim
33 words
An electrostatographic developer composition comprising a carrier, a resin toner and a dye colorant, said dye colorant being substantially dispersed throughout said toner and said colorant comprising a yellow dye satisfying the formula:
Claim 9
Dependent Claim
33 words
An electrostatographic developer composition comprising a carrier, a resin toner and a dye colorant, said dye colorant being substantially dispersed throughout said toner and said colorant comprising a yellow dye satisfying the formula:
Claim 10
Dependent Claim
17 words
The composition as defined in claim 7 wherein said carrier is a methyl terpolymer coated steel bead.
Claim 11
Dependent Claim
16 words
The composition as defined in claim 8 wherein said resin is a styrene butyl methacrylate copolymer.
Claim 12
Dependent Claim
47 words
An electrostatographic imaging process comprising establishing an electrostatic latent image on a surface and contacting said surface with a powder electrostatographic developer comprising a carrier, a resin toner and a dye colorant, said dye colorant being susbstantially dispersed throughout said toner and said colorant satisfying the formula:
Claim 13
Dependent Claim
47 words
An electrostatographic imaging process comprising establishing an electrostatic latent image on a surface and contacting said surface with a powder electrostatographic developer comprising a carrier, a resin toner and a dye colorant, said dye colorant being susbstantially dispersed throughout said toner and said colorant satisfying the formula:
Claim 14
Dependent Claim
29 words
The imaging process as defined in claim 10 further including the steps of transfering said developed image to a receiving surface and fixing said image on said receiving surface.
Claim 15
Dependent Claim
14 words
The process as defined in claim 10 wherein said dye colorant satisfies the formula:
Claim 16
Dependent Claim
28 words
The process as defined in claim 12 wherein said resin is a styrene butyl methacrylate copolymer and and said carrier is a methyl terpolymer coated steel carrier bead.
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) | 1977-10-28 | 1978-04-29 | 1978-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-28 | 1982-04-29 | 1982-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-28 | 1986-04-29 | 1986-10-29 | $7700.00 | Window Closed / Lapsed |