Patent US4824751A successfully refreshed from Google Patents.
US4824751A
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Toners for electrophotographic process containing chromium complex salts
Assignee: Nippon Kayaku Co Ltd
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Filing: 1987-07-30
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Granted: 1989-04-25
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Expires: 2007-07-30
Abstract
Abstract A toner for an electrophotographic process which comprises a complex salt compound represented by the following formula (1) ##STR1## wherein X represents Cl, Br, So 2 NH 2 , So 2 CH 3 or So 2 C 2 H 5 and A⊕ represents an alkenyl or alkylammonium ion of 17-28 carbon atoms. The complex salt compound of the formula (1) acts as a negative charge control agent in the toner and is good in compatibility with a binder and the toner prepared using it is excellent in specific chargeability and durability of charge.
Inventors
- 👤 Toshihiko Matuura
- 👤 Kenzi Sawaki
- 👤 Seizin Shindo
- 👤 Michiko Torigoe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 01:24
CPC Classifications
G; G03; G03G; G03G5/00; G03G5/02; G03G5/04; G03G9/00; G03G9/08; G03G9/097; G03G9/09783; G03G9/09; G03G9/0906; G03G9/091
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
67 words
An electrophotographic toner capable of being electrified negatively comprising (a) a suitable binder; (b) an agent for coloring said toner; and (c) a complex salt compound represented by the following formula (1) : ##STR13## wherein X represents Cl, Br, SO 2 NH 2 , SO 2 CH 3 or SO 2 C 2 H 5 and A+ represents an alkenyl or alkylammonium ion of 17-28 carbon atoms.
Claim 2
Dependent Claim
67 words
An electrophotographic toner capable of being electrified negatively comprising (a) a suitable binder; (b) an agent for coloring said toner; and (c) a complex salt compound represented by the following formula (1) : ##STR13## wherein X represents Cl, Br, SO 2 NH 2 , SO 2 CH 3 or SO 2 C 2 H 5 and A+ represents an alkenyl or alkylammonium ion of 17-28 carbon atoms.
Claim 3
Dependent Claim
27 words
The toner of claim 1 wherein said complex salt compound is represented by the following formula ##STR14## wherein A.sup.⊕ is the same as defined in claim 1.
Claim 4
Dependent Claim
17 words
The toner of claim 2 wherein said complex salt compound is represented by the following formula: ##STR15##
Claim 5
Dependent Claim
17 words
The toner of claim 1 wherein said complex salt compound is represented by the following formula: ##STR16##
Claim 6
Dependent Claim
27 words
The toner of claim 1 wherein said complex salt compound is represented by the following formula ##STR17## wherein A.sup.⊕ is the same as defined in claim 1.
Claim 7
Dependent Claim
17 words
The toner of claim 5 wherein said complex salt compound is represented by the following formula; ##STR18##
Claim 8
Dependent Claim
12 words
The toner of claim 1 which has a particle size of 1-50μ.
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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) | 1992-04-24 | 1992-10-24 | 1993-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-24 | 1996-10-24 | 1997-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-24 | 2000-10-24 | 2001-04-25 | $7700.00 | Window Closed / Lapsed |