| THE PILOT INK CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20120082928 | ELECTROPHOTOGRAPHIC TONER AND METHOD FOR PRODUCING THE SAME - Disclosed is a decolorizable electrophotographic toner, including: a binder resin; and a colorant which contains at least a color developable compound and a color developing agent and is covered with an outer shell so as to have a capsule structure, wherein the number ratio of particles having an equivalent circle diameter of 0.6 μm or more and 2.5 μm or less of the toner when measured using a flow particle image analyzer after the toner is dispersed in an aqueous medium at a ratio of 0.08% by weight and the resulting dispersion is subjected to a stirring treatment in which stirring is performed at 5000 rpm for 30 minutes using a homogenizer (T-25 digital ULTRA-TURRAX (manufactured by IKA Japan K.K., provided with a shaft generator S25N-10G)) is 30% by number or less. | 04-05-2012 |
| 20110013967 | WATER-BASED BALLPOINT PEN - To provide a water-based ballpoint pen with a good feel while writing, which hardly causes the proceeding of ball corrosion with time and can maintain an excellent lubrication performance at writing. | 01-20-2011 |
| 20110008095 | REVERSIBLE THERMAL DISCOLORATION AQUEOUS INK COMPOSITION AND WRITING IMPLEMENT USING THE SAME AND WRITING IMPLEMENT SET - To provide a reversible thermal discoloration aqueous ink composition which is capable of suppressing the lightening and deepening of handwriting at the time when a writing implement containing the reversible thermal discoloration aqueous ink composition in the barrel, and particularly, which does not lighten the color of handwriting with time in an erecting state or does not lighten the color of handwriting by the application of vibration at transportation or at the time when it is carried on in an erecting state, as well as a writing implement using the same and a writing implement set. | 01-13-2011 |
| 20100310300 | WRITING IMPLEMENT WITH THERMOCHROMIC COLORING COLOR-MEMORY COMPOSITION - A writing implement with a thermochromic coloring color-memory composition which comprises a homogeneous solubilized mixture of (A) an electron donative coloring organic compound, (B) an electron accepting compound and (C) a reaction medium which controls color reactions of the components (A) and (B), wherein a complete decoloring temperature (T | 12-09-2010 |
| 20100248585 | DRAWING TOY AND DRAWING TOY SET USING THE SAME - An drawing toy | 09-30-2010 |
| 20100232865 | WATER-BASED INK COMPOSITION FOR BALLPOINT PENS - A water-based ink composition for a ballpoint pen wherein the initial start of writing and writing over time is good, and no blur in handwriting occur and a stable writing performance can be sustained and good handwriting can be continuously formed. A water-based ink composition for a ballpoint pen dissolving or dispersing a coloring agent in an aqueous medium. The aqueous medium substantially contains no water-soluble organic solvent and is composed of water. The water-based ink composition includes a thickening inhibitor together with a shear thinning viscosity-imparting agent. As the thickening inhibitor, one or two or more are selected from a group of polyalkylene glycol, polypropylene glycol derivatives, polyvinyl alcohol, polyvinyl pyrrolidone, cellulose-based polymer compounds, polymer compounds having a polyalkylene oxide group and/or surfactants having a polyoxyethylene group. | 09-16-2010 |
| 20100120614 | THERMOCHROMIC COLORING COLOR-MEMORY COMPOSITION AND THERMOCHROMIC COLORING COLOR-MEMORY MICROCAPSULE PIGMENT CONTAINING THE SAME - The present invention provides a thermochromic coloring color-memory composition which effectively produce a characteristic that colors can be reversibly memorized and maintained and has applicability to various fields and a thermochromic coloring color-memory microcapsule pigment containing the composition. | 05-13-2010 |
| 20100098476 | THERMOCHROMIC WRITING INSTRUMENT - There is provided a thermochromic writing instrument containing a thermochromic ink, which is capable of easily changing color of the handwriting of thermochromic ink by rubbing and also being quickly brought into a writing-capable state (pen-tip-projected state) or a stored state (pen-tip-retracted state) even when the user can use only one hand. | 04-22-2010 |
| 20100098475 | WRITING INSTRUMENT AND WRITING INSTRUMENT SET - Provided are a writing instrument produced at a lower cost than conventional thermochromic writing instruments utilizing frictional heat, slim like a pencil and not bulky because it contains an ink directly in a barrel thereof, and excellent in portability; and a set of the writing instruments. | 04-22-2010 |
| 20090155498 | COLOR-CHANGE LAMINATE - A color-change laminate in which a color tone derived from a porous layer is visually perceived in a dry state and a metallic lustrous property is visually perceived in a liquid-absorbed state of the porous layer caused by water application is excellent in luminance and which satisfies both of changing properties and decorative properties in the dry state and in the liquid-absorbed state. A color-change laminate includes a support having a metallic lustrous property and a porous layer provided on the surface of the support. The porous layer includes a low-refractive-index pigment and a transparent metallic lustrous pigment formed by coating a transparent core material with a metal oxide and/or a transparent metallic lustrous pigment having a color-flopping property all fixed onto a binder resin in a dispersed state and is different in transparency in a liquid-absorbed state and in a liquid-unabsorbed state. | 06-18-2009 |
| 20090071370 | LIQUID COMPOSITION FOR METACHROMATIC MEMBERS, AND METACHROMATIC MEMBER SET MAKING USE OF THE SAME - In a liquid composition for metachromatic members which is to be applied to a metachromatic member having a support and provided thereon a porous layer formed by fixing therein a low refractive index pigment in a disperse state together with a binder resin, the liquid composition has a liquid medium and dissolved and/or dispersed therein a solid matter having a refractive index of from 1.3 to 1.8. Also disclosed is a metachromatic member set having this liquid composition and a metachromatic member. The liquid composition for metachromatic members satisfies permanent preservability of images, having superior density retention and shape retention of images formed in the metachromatic member and being suitable for uses in which impressions of hands, feet and the like are taken and preserved or in which written images or stamped images are preserved. | 03-19-2009 |
| 20090050013 | THERMOCHROMIC COLORING COLOR-MEMORY COMPOSITION AND THERMOCHROMIC COLORING COLOR-MEMORY MICROCAPSULE PIGMENT CONTAINING THE SAME - A thermochromic coloring color-memory composition which comprises a homogeneous solubilized mixture of (A) an electron donative coloring organic compound, (B) an electron accepting compound and (C) an ester compound represented by the specific formula as a reaction medium which controls color reactions of the components (A) and (B). | 02-26-2009 |
| 20080293326 | HAIR FOR TOYS - Hair for toys which is constituted of filaments made of an alcohol-soluble resin is disclosed. The hair for toys may also be hair for toys which is constituted of filaments made of a composite resin made up of a core and a sheath, where at least one of the resin of the core and that of the sheath is an alcohol-soluble resin. | 11-27-2008 |
| 20080292385 | FRICTION BODY, WRITING INSTRUMENT AND WRITING INSTRUMENT SET - There is provided a friction body which is adapted to rub a thermochromic image or handwriting formed on a paper surface by use of thermochromic ink to thermally discolor the thermochromic image or handwriting by frictional heat resultant from rubbing, a thermal conductivity of a friction portion of the friction body is set to be within 0.05 W/(m·K) to 50 W/(m·K). | 11-27-2008 |
