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| Number | Title | Issue Date |
| 8178270 | Toner for development of electrostatic image A toner for development of electrostatic images, comprising colored resin particles containing a binder resin and a colorant, and an external additive, wherein the external additive contains fine particles of an inorganic layered clay compound, and the inorganic lay... | 05/15/2012 |
| 8168359 | Nanosized particles of phthalocyanine pigments Nano-sized phthalocyanine pigment particles include a phthalocyanine chromogen structure as the main component, and a substituted soluble metal-phthalocyanine dye as a minor component that is associated non-covalently with the phthalocyanine chromogen structure, whe... | 05/01/2012 |
| 8163451 | Electrostatic latent image developing toner and method of image forming An electrostatic latent image developing toner comprising at least a resin, a wax and a colorant, wherein the wax comprises 40 to 98% by mass of a first release agent comprising an ester wax and 2 to 60% by mass of a second release agent comprising a hydrocarbon hav... | 04/24/2012 |
| 8097390 | Electrophotographic toner, invisible electrophotographic toner, electrophotographic developer, toner cartridge, process cartridge, and image formation apparatus The invention provides an electrophotographic toner containing at least a binder resin and an infrared absorber, the infrared absorber comprising a perimidine-squarylium dye represented by the following Formula (1). The invention further provides an invisible electr... | 01/17/2012 |
| 8092964 | Toner Disclosed is a toner comprising a resin and a colorant, wherein the colorant comprises a compound represented by formula (I) and a compound represented by formula (II). ... | 01/10/2012 |
| 8062819 | Magenta toner for developing electrostatic image A magenta toner for developing an electrostatic image composed of a binder and a colorant is disclosed. The toner contains a tone controlling agent having a peak of fluorescent spectrum from 380 to 500 nm. An image excellent in light fastness and durability can be o... | 11/22/2011 |
| 8007975 | Colorant and toner A colorant comprising an aggregate of a molecule having a squarylium skeleton and having a maximum absorption wavelength at about 500 nm to about 600 nm in a molecular dispersion state. ... | 08/30/2011 |
| 7807325 | Toner for use in electrostatic image development An electrostatic image developing toner is disclosed, comprising a resin and a colorant, wherein the toner contains at least one iminocarboxylic acid or its salt in an amount of from 26 to 388 ppm by mass. ... | 10/05/2010 |
| 7732114 | Modified nigrosine, its production method, and toner for developing electrostatic charge images using this modified nigrosine Modified nigrosine which has satisfactory dispersibility in resin and which reduces the residual aniline amount is offered, and its production method is also offered. Moreover, toner for developing electrostatic charge images is offered, which uses modified nigrosin... | 06/08/2010 |
| 7666563 | Toner and developer using the toner A toner is provided including a binder resin including at least one polyester resin in an amount of from 50 to 100% by weight, and a colorant having a specific formula, wherein the toner has a shape factor SF-1 of from 120 to 150 and a shape factor SF-2 of from 125 ... | 02/23/2010 |
| 7648812 | Toner, developer, and image forming apparatus A toner is provided including a binder resin; a release agent; a colorant; and a fatty acid amide compound, wherein the binder resin includes: an amorphous polyester (A) having a softening point of from 70 to 140° C.; an amorphous polyester (B) having a softening p... | 01/19/2010 |
| 7629097 | Encapsulated toner compositions incorporating organic monomeric glasses The present invention is an electrostatographic core shell toner which includes as a core material of at least two nonpolymeric compounds each independently corresponding to the structure (R1Y1)p[(Z1Y2)m | 12/08/2009 |
| 7598012 | Coloring compound and recording material using the same Disclosed herein are a coloring compound represented by the general formula: A-L1-X-L2-B (1) wherein A is a coloring moiety, B is a stabilizing moiety having fading-preventing ability, L1 and L2 ar... | 10/06/2009 |
| 7595139 | Metal complex dye, color toner and color filter A metal complex dye is disclosed, containing a dye as a ligand represented by the following formula (1). A color toner and a color filter containing the metal complex dye are also disclosed. ... | 09/29/2009 |
| 7442480 | Positively chargeable toner A positively chargeable toner comprising a resin binder, a specified compound represented by the formula (I), and a higher fatty acid with a long-chain alkyl group having 8 to 22 carbon atoms and/or a metal salt thereof. The positively chargeable toner is a positive... | 10/28/2008 |
| 7442481 | Charge control agent A composition comprising a toner binder and a charge control agent comprising a sulfonation product of Solvent Blue 23, wherein from greater than 0 up to 30 mole % of the Solvent Blue 23 is sulfonated. ... | 10/28/2008 |
| 7439003 | Magnetic black toner for electrophotography having Mn-containing hematite compound and magnetic two-component developer for electrophotography containing the same A magnetic black toner for electrophotography comprising a binding resin, a magnetic substance, and a pigment, wherein the pigment is at least one of phthalocyanine pigment and Mn containing hematite, and the content ratio of the magnetic substance and the pigment i... | 10/21/2008 |
| 7429441 | Electrostatic charge developing toner The present invention provides an electrostatic charge developing toner which uses a β-type copper phthalocyanine pigment that has a BET specific surface area of 90 m2/g or greater as determined by the nitrogen adsorption method. ... | 09/30/2008 |
| 7427461 | Toner for developing electrostatic latent image, image forming apparatus and image forming method A toner for developing an electrostatic latent image, including toner particles that include at least a binder resin and a quinacridone pigment. The quinacridone pigment includes quinacridone represented by the following structural formula which has a β-type crysta... | 09/23/2008 |
| 7422834 | Electrostatic latent image developing magenta toner, electrostatic latent image developer, toner manufacturing method, and image forming method An electrostatic latent image developing magenta toner includes at least quinacridone pigment, naphthol pigment, and a release agent. Colorant of the toner satisfies conditions (a) and (b): (a) an average primary particle size D50 of a quinacridone pigment represent... | 09/09/2008 |
| 7420632 | Color filter and liquid crystal display device provided with the same A color filter is provided with red, green and blue color filter segments. When chromaticity coordinates (x, y) in a chromaticity diagram of XYZ color specification system are measured with the color filter being sandwiched between two polarizers, a chromaticity (x | 09/02/2008 |
| 7416826 | Color toner for electrophotography and color toner set for electrophotography using the same, color developer for electrophotography, method for forming color image, and apparatus for forming color image A color toner for electrophotography having excellent fixability and void resistance is capable of forming a high-quality image. The color toner for electrophotography comprises a binder resin and is a magenta toner, and used in combination with at least any of yell... | 08/26/2008 |
| 7416601 | Black perylene pigments Black perylene pigments which comprise one of the isomers of the formula Ia or Ib in which R1, R2 are each independently phenylene, naphthylene or pyridylene, each of which may be mono- or... | 08/26/2008 |
| 7410739 | Color image forming developer, color image forming method, and color image forming device The present invention provides a color image forming developer comprising yellow, magenta, and cyan toners each containing an infrared absorber, wherein the cyan toner has a maximum infrared absorbance in the infrared region lower than that of the magenta toner and ... | 08/12/2008 |
| 7399566 | Color toner and developer compositions and processes for making and using such compositions The invention provides novel colored toner and developer compositions containing polymeric colorants. Such compositions may contain poly(oxyalkylene) or poly(alkylester) substituted color chromophores which are attached to relatively long chained ologomers. The colo... | 07/15/2008 |
| 7384472 | Pigment preparations based on PY 155 The invention concerns a pigment preparation based on C.I. Pigment Yellow 155, containing 0.1% to 50% by weight, based on the weight of C.I. Pigment Yellow 155, of at least one pigment dispersant from the group of monoazo or disazo pigments substituted with at least... | 06/10/2008 |
| 7374847 | Toner and developer for developing electrostatic image and image forming method A toner for developing an electrostatic image is disclosed. The toner contains an amount of not less than 0.1% by weight of an element selected from elements of the Groups of 1B, 2B, 4B, 5B, 6B, 7B, 8, 3A and 4A of the fourth and fifth periodic of the long periodic ... | 05/20/2008 |
| 7361441 | Color toner, and full-color image-forming method A yellow toner in which, in a spectral-distribution diagram in which the reflectance (%) is plotted as ordinate and the wavelength (nm) as abscissa, the reflectance determined for a toner in a state of powder ranges from 15% to 20% at a wavelength of 500 nm and rang... | 04/22/2008 |
| 7334458 | Direct method to determine particulate concentration in a dispersion Particulate material concentration of a dispersion is detected by providing a known amount of dispersion including particulate material, a solvent, and other optional components; centrifuging the dispersion and separating the particulate material from the dispersion... | 02/26/2008 |
| 7333744 | Image forming apparatus that charges a photosensitive member by superimposing an alternate current bias voltage on a direct current bias voltage as the charge bias voltage A charge apparatus charges by uniformly superimposing an alternate current bias voltage with a fixed frequency over a direct current bias voltage as the charge bias voltage on a photosensitive member. An exposure apparatus exposes the surface of the charged photosen... | 02/19/2008 |
| 7318860 | Green pigment preparations A green pigment preparation that is characterized by a C.I. Pigment Yellow 214 and at least one copper phthalocyanine pigment C.I. Pigment Blue 15:3 and/or C.I. Pigment Blue 15:1 content, the ratio of C.I. Pigment Yellow 214 to the at least one copper phthalocyanine... | 01/15/2008 |
| 7316879 | Imaging color toner, color image forming method and color image forming apparatus In an imaging color toner employing a photofixing system, a binder resin, which contains, as a principal component, a polyester resin obtained by mixing a first polyester resin having a softening point Tsp of not lower than 120° C. and lower than 170° C. with a se... | 01/08/2008 |
| 7316882 | Image forming method The present invention provides an image forming method for obtaining excellent color fixed images with a smaller amount of light energy. This image forming method includes the steps of: forming a toner layer of a color toner containing at least a binder resin, a col... | 01/08/2008 |
| 7316875 | Photochromic paper with improved bistability An image forming medium including at least a polymer and a photochromic compound such as spiropyran embedded in the polymer, wherein spiropyran molecules of the spiropyran compound are chelated by a cation. ... | 01/08/2008 |
| 7314696 | Electrophotographic toner and development process with improved charge to mass stability Toners and developers are disclosed. The toner of the present invention contains at least one toner resin, at least one charge control agent, at least one surface treatment agent, and optionally at least one release agent and/or colorant. The toners of the present i... | 01/01/2008 |
| 7309558 | Use of salt-like structured silicas as charge control agents The present invention relates to the use of salt-like structured silicates, in which the cation is NH4+, H3O+, an alkali metal, alkaline earth metal, earth metal or transition metal ion or a low molecular weight organic ca... | 12/18/2007 |
| 7303624 | Structurally coated silica A structurally coated silica can be prepared by spraying and mixing a pyrogenic silica with water and a coating agent in a suitable mixing vessel, then milling and then conditioning the product. The structurally coated silica can be used as a matting agent in... | 12/04/2007 |
| 7300608 | Blue colored composition for color filter and color filter A blue colored composition for a color filter contains a pigment carrier comprising a transparent resin, a precursor thereof or a mixture thereof, a blue pigment having a specific surface area of 90 to 140 m2/g, and a violet pigment having a specific surf... | 11/27/2007 |
| 7300727 | Method for forming temporary image An image forming method composed of: (a) providing a reimageable medium composed of a substrate and a photochromic material, wherein the medium is capable of exhibiting a color contrast and an absence of the color contrast; (b) exposing the medium to an imaging ligh... | 11/27/2007 |
| 7288351 | Magenta toner for developing electrostatic images, process for production thereof, developer and image-forming method A magenta toner for developing electrostatic images provided which contains a binder resin and a colorant, wherein the colorant includes a mixed crystal of two or more colorants and when a solid patch is fixed on art paper complying with the ISO standard by using th... | 10/30/2007 |
