Patent EP0016397A1 successfully refreshed from Google Patents.
US4624907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophotographic toner containing metal complex
Assignee: Hodogaya Chemical Co Ltd
•
Filing: 1984-11-08
•
Granted: 1986-11-25
•
Expires: 2004-11-08
Abstract
Abstract An electrophotographic toner capable of being electrified negatively comprising: (a) a binder resin; and (b) a charge-controlling and coloring agent comprising at least one 2:1 type metal complex of the formula (I): <IMAGE> where each of X1 and X2, which may be the same or different, is a hydrogen atom, a C1-C5 alkyl group, a C1-C5 alkoxy group, a nitro group or a halogen atom, each of m and m' is an integer of 1 to 3, each of R1 and R2, which may be the same or different, is a hydrogen atom, a C1-C5 alkyl group, a C1-C5 alkoxy group, a halgen atom, a nitro group, a sulfonamide group, a methylsulfonyl group, an ethylsulfonyl group, an acetyl amino group or a benzoyl amino group, each of n and n' is an integer of 1 to 3, Y(+) is an ammonium ion, an aliphatic ammonium ion, an alicyclic ammonium ion or a heterocyclic ammonium ion, and M is a chromium atom, a cobalt atom or an iron atom.
Inventors
- 👤 Isao Niimura
- 👤 Katsuichi Motohashi
- 👤 Hiroyoshi Yamaga
- 👤 Noboru Akuzawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:16
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/091
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
191 words
An electrophotographic toner capable of being electrified nagatively comprising: (a) a binder resin; and (b) a charge-controlling and coloring agent comprising at least one 2:1 type metal complex of the formula (I): ##STR87## where each of X 1 and X 2 , which may be the same or different, is a hydrogen atom, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a nitro group or a halogen atom, each of m and m' is an integer of 1 to 3, each of R 1 and R 2 , which may be the same or different, is a hydrogen atom, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a halogen atom, a nitro group, a sulfonamide group, a methylsulfonyl group, an ethylsulfonyl group, an acetyl amino group or a benzoyl amino group, each of n and n' is an integer of 1 to 3, Y.sup.⊕ is an ammonium ion, an aliphatic ammonium ion, an alicyclic ammonium ion or a heterocyclic ammonium ion, and M is an iron atom, provided that R 1 and R 2 are not simultaneously nitro groups.
Claim 2
Dependent Claim
191 words
An electrophotographic toner capable of being electrified nagatively comprising: (a) a binder resin; and (b) a charge-controlling and coloring agent comprising at least one 2:1 type metal complex of the formula (I): ##STR87## where each of X 1 and X 2 , which may be the same or different, is a hydrogen atom, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a nitro group or a halogen atom, each of m and m' is an integer of 1 to 3, each of R 1 and R 2 , which may be the same or different, is a hydrogen atom, a C 1 -C 5 alkyl group, a C 1 -C 5 alkoxy group, a halogen atom, a nitro group, a sulfonamide group, a methylsulfonyl group, an ethylsulfonyl group, an acetyl amino group or a benzoyl amino group, each of n and n' is an integer of 1 to 3, Y.sup.⊕ is an ammonium ion, an aliphatic ammonium ion, an alicyclic ammonium ion or a heterocyclic ammonium ion, and M is an iron atom, provided that R 1 and R 2 are not simultaneously nitro groups.
Claim 3
Dependent Claim
19 words
The electrophotographic toner according to claim 1, wherein Y.sup.⊕ is a cation selected from the group consisting of ##STR88##
Claim 4
Dependent Claim
61 words
The electrophotographic toner according to claim 1, wherein each of X 1 and X 2 is --H, --NO 2 , --OCH 3 , --Cl or --CH 3 , and ech of R 1 and R 2 is --H, --Cl, --CH3, --C 4 H 9 , --NO 2 , --COCH 3 , --SO 2 NH 2 , --CHO or --OCH 3 .
Claim 5
Dependent Claim
54 words
The electrophotographic toner according to claim 1, wherein the binder resin is a homopolymer or copolymer of styrene, polyvinyl chloride, polypropylene, a silicone resin, polyvinyl butyral, rosin, modified rosin, a terpene resin, a phenolic resin, a xylene resin, an aliphatic or alicyclic hydrocarbon, an aromatic series petroleum resin, a chlorinated paraffin, or paraffin wax.
References Cited (Backward Citations)
JPS5267331A
Cited
JPS55135854A
Cited
US4362803A
Cited
US4433040A
Cited
JPS57167033A
Cited
JPS58152256A
Cited
US4562136A
Cited
US4562136B1
Cited
JPS58208750A
Cited
JPS5950449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |