US4518672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyan color toner for developing electrostatic image
Assignee: Canon Inc
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Filing: 1983-05-16
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Granted: 1985-05-21
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Expires: 2003-05-16
Abstract
Abstract A cyan color toner for developing electrostatic images was provided which comprises a compound respresented by the general formula shown below in the resin and which has excellent spectral reflection characteristics. ##STR1## where X 1 , X 2 , X 3 and X 4 are ##STR2## or --H, but are not simultaneously hydrogen, and R and R' are alkylene group of carbon number of from 1 to 5.
Inventors
- 👤 Motoo Urawa
- 👤 Eiichi Imai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:14
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/09; G03G9/0906; G03G9/0918
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A cyan toner particle for electrostatic charge development which consists essentially of a compound represented by the general formula [I] shown below, and an electric charge controller, in which the charge polarity of said toner particle is governed by the charge polarity of said charge controller in a binder resin: ##STR6## where X 1 , X 2 , X 3 and X 4 are ##STR7## or --H, but are not simultaneously hydrogen, and R and R' are each an alkylene group having from 1 to 5 carbon atoms.
Claim 2
Dependent Claim
88 words
A cyan toner particle for electrostatic charge development which consists essentially of a compound represented by the general formula [I] shown below, and an electric charge controller, in which the charge polarity of said toner particle is governed by the charge polarity of said charge controller in a binder resin: ##STR6## where X 1 , X 2 , X 3 and X 4 are ##STR7## or --H, but are not simultaneously hydrogen, and R and R' are each an alkylene group having from 1 to 5 carbon atoms.
Claim 3
Dependent Claim
39 words
A cyan color toner for developing an electrostatic image according to claim 1 where in said compound represented by the general formula [I] is contained in a quantity of 0.1 to 20% by weight based on the binder resin.
Claim 4
Dependent Claim
34 words
A cyan color toner for developing an electrostatic image according to claim 1, wherein a free flow modifier is added in a quantity of from 0.01 to 5% by weight based on the toner.
Claim 5
Dependent Claim
28 words
A toner particle according to claim 1, in which said charge controller is selected from the group consisting of a positively chargeable substance and a negatively chargeable substance.
Claim 6
Dependent Claim
26 words
A cyan color toner for developing electrostatic image according to claim 1, wherein X 1 , X 2 , X 3 and X 4 are ##STR8##
Claim 7
Dependent Claim
34 words
A cyan color toner particle for developing an electrostatic image, which comprises a compound represented by the general formula [I] shown below in a binder resin: ##STR9## wherein X 1 -X 4 are ##STR10##
Claim 8
Dependent Claim
34 words
A cyan color toner particle for developing an electrostatic image, which comprises a compound represented by the general formula [I] shown below in a binder resin: ##STR9## wherein X 1 -X 4 are ##STR10##
Claim 9
Dependent Claim
20 words
A cyan color toner for developing an electrostatic image according to claim 1, wherein X 1 -X 4 are ##STR11##
Claim 10
Dependent Claim
20 words
A cyan color toner for developing an electrostatic image according to claim 1, wherein X 1 -X 4 are ##STR12##
Claim 11
Independent Claim
109 words
A method for developing an electrostatic latent image which comprises triboelectrically charging cyan color toner particles comprising a compound represented by the general formula [I] shown below and an electric charge controller, in which the charge polarity of said toner particle is governed by the charge polarity of said charge controller in a binder resin: ##STR13## where X 1 , X 2 , X 3 and X 4 are ##STR14## or --H, but are not simultaneously hydrogen, and R and R' are each an alkyline group having from 1 to 5 carbon atoms, and applying the triboelectrically charged cyan color toner particles to a latent image to effect development.
Claim 12
Independent Claim
109 words
A method for developing an electrostatic latent image which comprises triboelectrically charging cyan color toner particles comprising a compound represented by the general formula [I] shown below and an electric charge controller, in which the charge polarity of said toner particle is governed by the charge polarity of said charge controller in a binder resin: ##STR13## where X 1 , X 2 , X 3 and X 4 are ##STR14## or --H, but are not simultaneously hydrogen, and R and R' are each an alkyline group having from 1 to 5 carbon atoms, and applying the triboelectrically charged cyan color toner particles to a latent image to effect development.
References Cited (Backward Citations)
US2297691A
Cited
US2761868A
Cited
US4071361A
Cited
US3666363A
Cited
GB1307544A
Cited
BE744344A
Cited
US4066563A
Cited
JPS5245931A
Cited
JPS543372A
Cited
US4243736A
Cited
US4221606A
Cited
US4311775A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |