| Patents for C09D 13 - Pencil-leads; Crayon compositions; Chalk compositions (802) |
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| 03/30/2005 | CN1195027C Mark-hidden tailor's chalk |
| 03/23/2005 | CN1597338A Manufacturing method of artificial slabstone pencil core |
| 03/23/2005 | CN1597337A Manufacturing method of sanitary chalk |
| 03/17/2005 | WO2005023944A1 A simple and efficient process for the preparation of pencil lead from spent pot-liners |
| 03/16/2005 | CN1594465A Multifunctional water soluble painting rod (formulation) |
| 03/10/2005 | US20050053633 Prepared by extrusion of a lead starting mass including a sugar and/or sugar alcohol and at most 2% water at an elevated temperature, which causes softening of the sugar and/or sugar alcohol; simple cooling gives the finished lead so complex solvent removal is unnecessary |
| 03/10/2005 | US20050053410 Simple and efficient process for the preparation of pencil lead from spent pot-liners |
| 01/27/2005 | DE20314685U1 Thermoplastically processable masses, especially pencil leads or bonbons, containing sugar or sugar alcohol plus cellulose or starch derivative and/or fatty or waxy material as softenable binder system |
| 01/12/2005 | CN1563224A Colored lead core |
| 12/29/2004 | CN1557888A Colored materials used on the surface of objects |
| 12/15/2004 | CN1554718A Recipe of water oil painting stick and its producing method |
| 12/14/2004 | US6830610 Method for increasing the tensile, breaking and flexural strength of colored leads and colored pencils containing the same |
| 12/09/2004 | US20040247825 Coloring media having improved brightness and color characteristics |
| 12/09/2004 | US20040247824 Optically transparent carrier having radiation absorption over visible band of electromagnetic spectrum; distribution of reflective microflakes comprising cholesteric liquid crystal (CLC) are suspended; inks, paints, crayons; super-white and additive-primary coloring media |
| 11/18/2004 | US20040226480 Effect pigments coated with reactive orientation aids |
| 11/18/2004 | DE202004012747U1 Erasable colored lead for pencils, comprises filler, colors and an alginate as binder, has increased coloring strength with better smearing properties and ereasability |
| 11/10/2004 | CN1544552A Tunnel fireproof paint based on nano-surface-treatment technology and method for making same |
| 11/09/2004 | US6815471 Erasable colored pencil lead |
| 10/20/2004 | EP1468055A1 Pigment-containing gel mass based on lipids |
| 09/21/2004 | US6793720 Anticounterfeiting hand signatures; well perceived and measurable angle dependent color shift |
| 09/16/2004 | DE20122228U1 Paint comprises a starch material as a basic substance to which a pigment is added |
| 07/13/2004 | US6761762 Agitating and heating initial pigment in organic solvent, mixing pigment with solution of base in water or another solvent, adding organic solvent based surface-modifying agent to mixture, cooling, removing liquid to form filter cake |
| 06/17/2004 | DE10256108A1 Wax pencil lead for writing or cosmetic use with wax and oil components, has wax component predominantly comprising shellac wax to give improved properties at summer temperatures |
| 06/08/2004 | US6746524 Process for producing sintered color pencil lead |
| 05/27/2004 | DE20319911U1 Kosmetische Feststoffmine Cosmetic hard lead |
| 04/29/2004 | DE202004001932U1 Manual production of mini-chalks for writing or artwork comprises providing casting molds, a pouring beaker, a measuring spoon, a spatula for stirring, colored water and special gypsum |
| 03/23/2004 | US6709501 Baked color pencil lead and process for producing the same |
| 03/17/2004 | EP1093495B1 Erasable colored pencil lead |
| 02/26/2004 | DE10236681A1 Marker pen comprises a water-based abradable soft solid composition comprising a colorant, an acid-functional polyacrylate and a soap gel |
| 02/18/2004 | CN1138647C Blackboard writing pen and its making process |
| 02/11/2004 | CN1473890A Short period recording pen |
| 02/11/2004 | CN1137946C Rare-earth chalk and its preparing method |
| 01/29/2004 | US20040016366 Unburned color pencil lead |
| 01/22/2004 | DE19830929B4 Gebrannte Farbbleistiftmine und Verfahren zu ihrer Herstellung Baked color pencil lead and methods for their preparation |
| 01/21/2004 | CN1468734A Chalk producing process |
| 01/06/2004 | US6673138 Multi-color crayon or oil pastel and method of producing the same |
| 11/12/2003 | EP1100685B1 Marking system |
| 11/11/2003 | US6645279 Impregnating pores with dye ink solution; flexural strength; vivid, high density drawn lines |
| 11/05/2003 | CN1453148A Teacher's liquid chalk with environment protecting nano material |
| 10/22/2003 | CN1450128A Dust free chalk and preparation process thereof |
| 10/07/2003 | US6630974 Super-wide-angle cholesteric liquid crystal based reflective broadband polarizing films |
| 09/23/2003 | US6623197 Water-based solid marking composition, method for producing the same, and water-based marking instrument containing the same |
| 09/10/2003 | EP1342761A1 Water-based solid marking composition, method for producing the same, and water-based marking instrument containing the same |
| 08/05/2003 | US6602332 Can be used to draw a picture on an object such as a paper; picture that is drawn exhibiting a glittering effect on a transparent background and being intimately adhered to the object maintaining resistance against being peeled off |
| 07/24/2003 | WO2003060024A1 Pigment-containing gel mass based on lipids |
| 07/09/2003 | EP0811042B1 Pressure-sensitive crayon adhesive |
| 07/09/2003 | EP0721485B1 Correction and marking materials |
| 07/09/2003 | CN1428383A Mark-hidden tailor's chalk |
| 07/03/2003 | DE10201370C1 Pigmented oleogel, used for making colored lead for pencil or propelling pencil, especially cosmetic pencil, contains oil-soluble alkylcellulose, alkylgalactomannan and amidoalkyl dialkyl amine fatty acid salt with long fatty acid chains |
| 06/17/2003 | US6579530 Cosmetic powder pencil or powder chalk |
| 06/11/2003 | CN1423681A Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments |
| 06/04/2003 | CN1421499A Material for making color pen or pen refill and its usage |
| 05/29/2003 | US20030100629 Colored lead or chalk having a porous basic lead body and comprising a filler and a non-ionic associative thickener where the lead body cavities are filled with a solid or liquid; graphic arts; cosmetics; heat resistance |
| 05/21/2003 | EP1251819A4 Washable non-toxic body paint for applying color to human skin |
| 04/16/2003 | EP1302516A1 Unburned color pencil lead |
| 04/10/2003 | US20030068288 Cosmetic powder pencil or powder chalk |
| 04/02/2003 | EP0994775A4 Coloring media having improved brightness and color characteristics |
| 03/27/2003 | US20030056688 Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments |
| 03/12/2003 | EP1291399A2 Powderstick with a porous lead base body |
| 02/13/2003 | US20030029354 Solid glitter marker |
| 01/30/2003 | US20030022962 Composition for extruded pencil casings, and pencil casings and pencils made therefrom |
| 01/28/2003 | US6511533 Non-calcined lead of a colored pencil |
| 01/22/2003 | CN2532081Y Chalk with coating |
| 01/08/2003 | EP1272577A1 Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments |
| 01/02/2003 | US20030000420 Baked color pencil lead and process for producing the same |
| 12/26/2002 | US20020195021 Drawing performance and vividness of color; granular coloring phases of a collapsible granular material which includes a hue different from the matrix, a body, and a water soluble high molecular weight material or water swelling clay in a matrix |
| 12/18/2002 | CN1385319A Multi-color pen or oil colour wax-pen and production method thereof |
| 11/20/2002 | EP1258235A1 Powder pencil core or powder chalk |
| 10/31/2002 | DE10119292A1 Powder pencil lead or chalk for cosmetic use or pastel drawing, comprises fillers and a copolymer of polyethylene glycol and tetramethoxymethylglycoluril |
| 10/30/2002 | EP1251819A1 Washable non-toxic body paint for applying color to human skin |
| 10/03/2002 | US20020139278 Binder, a colorant, a body filler, an oily substance being a liquid at room temperature and surfactant(s) having a given hydrophobic-lipophilic balance(HLB) range; made easily, erasable with rubber eraser, strength, and performance |
| 07/24/2002 | EP1084198B1 Effect pigments coated with reactive orientation auxiliary agents |
| 07/11/2002 | DE10100667A1 Paint comprises a starch material as a basic substance to which a pigment is added |
| 06/11/2002 | US6404464 Method and system for producing color images with improved brightness and color characteristics on radiation absorptive surfaces |
| 06/05/2002 | CN1352222A Dust-free chalk and making process |
| 05/28/2002 | US6395076 Non-calcined lead of a colored pencil |
| 04/23/2002 | US6377325 Reflective film material having symmetrical reflection characteristics and method and apparatus for making the same |
| 03/20/2002 | EP1093494A4 Crayons containing ester waxes |
| 02/28/2002 | US20020025995 Erasable colored pencil lead |
| 01/09/2002 | EP1169398A1 Method for increasing the tensile, breaking and flexural strength of coloured leads and coloured pencils containing the same |
| 12/27/2001 | WO2001098417A1 Unburned color pencil lead |
| 12/25/2001 | CA2157704C A wax-like substance and a molding method using a wax-like substance |
| 11/15/2001 | US20010040653 Reflective film material having symmetrical reflection characteristics and method and apparatus for making the same |
| 11/13/2001 | US6316526 Mixing crushed base materials containing thermolabile polymeric binding agent, inorganic filler and coloring agent with water; extruding to form raw leads; heat treating to decompose binding agent |
| 10/25/2001 | WO2001079365A1 Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments |
| 10/17/2001 | EP1146098A1 Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments |
| 10/16/2001 | US6304744 Artist's marking material |
| 10/11/2001 | US20010029275 Wet surface writing; mixture of coloring agent, gelation agent, binder and solvent |
| 09/26/2001 | EP1136531A1 Solid composition |
| 08/21/2001 | US6277182 Pigment-containing oil-based gel materials |
| 08/15/2001 | CN1307979A Blackboard writing pen and its making process |
| 08/09/2001 | WO2001056535A1 Washable non-toxic body paint for applying color to human skin |
| 08/09/2001 | CA2388270A1 Washable non-toxic body paint for applying color to human skin |
| 08/07/2001 | US6271286 Colors with binder resins, fibrillatable, lubricants, fillers and antioxidants |
| 08/01/2001 | CN1306558A Crayons contg. ester waxes |
| 08/01/2001 | CN1306048A Rare-earth chalk and its preparing process |
| 07/17/2001 | US6262143 Erasable colored pencil lead |
| 07/04/2001 | CN1302316A Erasable colored pencil lead |
| 06/27/2001 | CN1301217A Marking system |
| 06/14/2001 | US20010003473 Super-wide-angle cholesteric liquid crystal based reflective broadband polarizing films |