Patent US4652509A successfully refreshed from Google Patents.
US4652509A
Expired / Lapsed
US
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Toner for developing electrostatic latent image
Assignee: Konica Minolta Inc
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Filing: 1985-03-10
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Granted: 1987-03-24
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Expires: 2005-03-10
Abstract
Abstract A toner for developing an electrostatic latent image comprising a binder resin, a coloring agent, a compound selected from a group consisting of silica and a hydrophobic aluminum oxide or a hydrophobic titanium oxide.
Inventors
- 👤 Meizo Shirose
- 👤 Jiro Takahashi
- 👤 Hiroshi Tsuchiya
- 👤 Tadashi Kaneko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:03
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/097; G03G9/09708; G03G9/09716; C; C01; C01F; C01F7/00; C01F7/02; C01G; C01G23/00; C01G23/04; C01G23/047; C01P; C01P2004/00; C01P2004/60; C01P2004/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
33 words
Toner for developing an electrostatic latent image comprising a binder resin, a coloring agent, a compound selected from a group consisting of silica and a hydrophobic aluminum oxide or a hydrophobic titanium oxide.
Claim 2
Dependent Claim
33 words
Toner for developing an electrostatic latent image comprising a binder resin, a coloring agent, a compound selected from a group consisting of silica and a hydrophobic aluminum oxide or a hydrophobic titanium oxide.
Claim 3
Dependent Claim
34 words
The toner of claim 1, wherein said hydrophobic aluminium oxide or titanium oxide being incorporated in said toner at an amount not more than 10% by weight relative to the total weight of toner.
Claim 4
Dependent Claim
34 words
The toner of claim 1, wherein said hydrophobic aluminium oxide or titanium oxide being incorporated in said toner at an amount not more than 5% by weight relative to the total weight of toner.
Claim 5
Dependent Claim
40 words
The toner of claim 1, wherein said hydrophobic aluminium oxide or titanium oxide being produced by heat reacting an aluminium oxide or titatium oxide with a compound selected from a di-alkyl-di-halogenated silane, a tri-alkylhalogenated silane, alkyl-tri-hlogenated silane and a hexaalkyl-di-silazane.
Claim 6
Dependent Claim
24 words
The toner of claim 1, wherein said hydrophobic aluminium oxide or titanium oxide having an average particle size of not more than 1 micron.
Claim 7
Dependent Claim
24 words
The toner of claim 5, wherein said hydrophobic aluminium oxide or titanium oxide having an average particle size of not more than 0.5 microns.
Claim 8
Dependent Claim
13 words
The toner of claim 1, wherein said coloring agent is a magnetic substance.
Claim 9
Dependent Claim
12 words
The toner of claim 1, wherein said coloring agent is carbon black.
Claim 10
Dependent Claim
31 words
The toner of claim 1, wherein said toner further comprises a compound selected from a group consisting of a hydrophobic aluminium oxide and a friction-reducing agent not containing a metallic element.
Claim 11
Dependent Claim
31 words
The toner of claim 9, wherein said friction-reducing agent is selected from fatty acids, alcohols thereof, mono- or poly esters of said alcohols, fatty acidamides, polyethylene glycols and methoxy polyethylene glycol.
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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |