Patent US3432815A successfully refreshed from Google Patents.
US4066563A
Expired / Lapsed
US
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Copper-tetra-4-(octadecylsulfonomido) phthalocyanine electrophotographic carrier
Assignee: Xerox Corp
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Filing: 1975-09-29
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Granted: 1978-01-03
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Expires: 1995-09-29
Abstract
Abstract A color electrophotographic process is provided which employs magenta, cyan and yellow toners, each in combination with a carrier coated with a resin containing copper tetra-4-(octadecylsulfonomido) phthalocyanine. Thus, for the first time a developer package is provided which is capable of producing prints of sharp quality employing a common carrier. The various magenta, cyan and yellow toners employed in connection with the newly provided coated carrier are also disclosed.
Inventors
- 👤 Joseph Mammino
- 👤 Franklin Jossel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:58
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/10; G; G03; G03G; G03G13/00; G03G13/01; G03G13/013; G03G13/0133; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0908; G03G9/091; G03G9/0916; G03G9/0918; G03G9/10; G03G9/113; G03G9/1138
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
20 words
A carrier for electrophotographic development comprising a core particle surrounded by an outer layer comprising resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine.
Claim 2
Dependent Claim
20 words
A carrier for electrophotographic development comprising a core particle surrounded by an outer layer comprising resin and copper tetra-4-(octadecylsulfonomido) phthalocyanine.
Claim 3
Dependent Claim
10 words
The carrier of claim 1 wherein said core is steel.
Claim 4
Dependent Claim
24 words
The carrier of claim 1 wherein said resin is selected from the group consisting of styrene-maleic anhydrides, novalac type phenolics and polymeric organo silicones.
Claim 5
Dependent Claim
17 words
The carrier of claim 1 wherein said resin is a polymer comprising styrene, methyl methacrylate and vinyltriethoxysilane.
Claim 6
Dependent Claim
22 words
The carrier of claim 1 wherein said phthalocyanine is present in about 0.25 to about 5 weight percent of said carrier coating.
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) | 1981-01-02 | 1981-07-04 | 1982-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-02 | 1985-07-04 | 1986-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-02 | 1989-07-04 | 1990-01-03 | $7700.00 | Window Closed / Lapsed |