| Patents for C09D 13 - Pencil-leads; Crayon compositions; Chalk compositions (802) |
|---|
| 10/08/1991 | US5055498 Plastic crayon |
| 10/06/1991 | WO1991015553A1 Phosphorescent marking material |
| 10/06/1991 | CA2079591A1 Phosphorescent marking material |
| 10/02/1991 | CN1054994A Method for eliminating blackboard chalk dust |
| 08/13/1991 | US5039243 Fragrance releasing crayons |
| 08/07/1991 | CN1053627A Water soluble crayon composition |
| 07/31/1991 | CN1053439A Water soluble crayon compositions |
| 07/03/1991 | EP0435386A1 Water soluble crayon compositions |
| 06/26/1991 | EP0434163A1 Water soluble crayon compositions |
| 06/20/1991 | CA2032632A1 Water soluble crayon compositions |
| 06/20/1991 | CA2032631A1 Water soluble crayon compositions |
| 04/17/1991 | EP0422204A1 Plastic crayon |
| 02/15/1991 | WO1991002769A1 Solid correction compositions |
| 02/15/1991 | CA2059548A1 Solid correction compositions |
| 02/12/1991 | US4992502 Solid correction compositions |
| 02/05/1991 | US4990013 Glitter crayon |
| 12/27/1990 | WO1990015848A1 Water soluble coloring compositions containing sparkle components |
| 12/18/1990 | US4978390 Washable solid marking composition |
| 11/07/1990 | CN1046746A Liq. for making film-enveloped chalk |
| 11/01/1990 | WO1990012845A1 Plastic crayon |
| 05/03/1990 | WO1990004621A1 Washable solid marking composition |
| 05/03/1990 | DE3929391C1 Drawing and painting material - comprises pastel type material with white pigment, colouring agents, filler, etc. |
| 02/01/1990 | DE3817807A1 Continuous extrusion of plastic cartridges for lead |
| 12/28/1989 | DE3827968C1 Pencil lead composition and process for its preparation |
| 12/14/1989 | DE3819034A1 Process for the production of a writing chalk having improved writing action |
| 09/14/1989 | DE3733060A1 Chemical composition, mixture, polymerisation and production process for the continuous production of dark and coloured pencils from thermoplastics and fillers |
| 08/01/1989 | US4853167 Method for making lead pencils and colored pencils |
| 06/20/1989 | US4840670 Water soluble coloring compositions containing sparkle components |
| 06/20/1989 | US4840669 Water soluble coloring compositions containing sparkle components |
| 05/11/1989 | DE3835241C1 Process for the production of pencil leads |
| 05/10/1989 | CN2037319U Colour wax crayon with printing function |
| 02/21/1989 | CA1250105A1 Process for making a kind of chalk |
| 01/11/1989 | EP0298705A2 Fragrance releasing crayons |
| 12/14/1988 | CN87103940A Longevity no-dust chalk |
| 11/22/1988 | US4786449 Casting temperature controlled small amounts of various colors of molten crayon materials into the same mold |
| 10/12/1988 | EP0233185B1 Method for producing anisotropic carbon fibres |
| 09/07/1988 | EP0281072A2 Method of making lead and coloured pencils |
| 09/06/1988 | US4768987 Toy automobile having a body formed by a composition for writing |
| 07/20/1988 | CN87107598A Joinable solid state chinese ink |
| 07/19/1988 | US4758540 Method for the production of pencil leads and pencil leads produced by the method |
| 05/03/1988 | US4741774 Plastic colored crayon |
| 03/16/1988 | EP0259712A2 Method for the manufacture of pencil leads, and pencil leads made by this method |
| 08/26/1987 | EP0233185A1 Method for producing anisotropic carbon fibres. |
| 05/26/1987 | US4668572 Pencil lead composition with magnesium oxysulfate fibrous material |
| 05/13/1987 | CN86207837U Chalk with protective coating |
| 03/11/1987 | CN85106708A Formulation of powderless chalk |
| 03/04/1987 | CN85106172A Magnetic chalk and chalk eraser |
| 12/24/1986 | CN85202843U 绘图铅笔 Pencil drawing |
| 11/12/1986 | CN85103595A Minute dust raising chalk and its making method |
| 10/22/1986 | CN85103428A Colour changeable pen |
| 10/14/1986 | US4617058 Process for producing blackboard crayon |
| 10/08/1986 | EP0196439A1 Article for writing, drawing, painting, marking, erasing or modelling containing flavouring substances |
| 10/08/1986 | CN86103372A Recipe and manufacturing process for making writing chalk giving very little dust |
| 07/29/1986 | US4602886 Multi-color marking implement |
| 07/09/1986 | CN85100832A Undiscolor painting chalk after being sprayed with fixative liquor |
| 07/03/1986 | WO1986002952A3 Method for producing anisotropic carbon fibres |
| 05/22/1986 | WO1986002952A2 Method for producing anisotropic carbon fibres |
| 05/10/1986 | CN85103372A Pilfer-proof plastic closure for containers |
| 01/15/1986 | EP0167788A2 Marking lead in the form of a solid lead |
| 07/18/1985 | WO1985003082A1 Process for producing blackboard crayon |
| 07/10/1985 | EP0147905A2 Multi-color marking implements, and method and apparatus for their manufacture |
| 01/03/1984 | CA1159743A1 Cosmetic pencil |
| 05/17/1983 | CA1146402A1 Low-moisture, frangible aerated confections and method of preparation |
| 05/10/1983 | US4382819 Drawing and coloring element in form of blackboard-chalk-like stick for producing pictures that can be fixed through application of heat |
| 02/01/1983 | US4371632 Compositions, processes, and writing elements employing resins of the thermosetting type |
| 10/28/1982 | WO1982003630A1 Compositions, processes, and writing elements employing resins of the thermosetting type |
| 08/04/1982 | EP0056818A1 Drawing implements |
| 06/30/1982 | EP0055226A1 Scented leads for pencils |
| 06/15/1982 | US4334546 Cosmetic pencil |
| 03/31/1982 | EP0048571A2 Pencil lead, and methods and apparatus for its manufacture |
| 03/17/1982 | EP0047573A2 Cosmetic pencil |
| 02/18/1982 | WO1982000444A1 Drawing implements |
| 11/03/1981 | US4298507 Flexible marking composition for pencils |
| 09/01/1981 | US4286890 Containing a curable epoxy resin and a curing agent for application to work surfaces |
| 03/31/1981 | CA1098641A1 Writing implement modified with plastics |
| 03/24/1981 | CA1098234A1 Drawing and painting element in the form of school chalk for producing images adapted to be fixed by the use of heat |
| 02/17/1981 | US4251561 Low-moisture, frangible aerated confections and method of preparation |
| 10/29/1980 | EP0017889A1 Writing system |
| 10/21/1980 | US4229334 Plastic modified writing compositions |
| 09/02/1980 | US4220356 Recording materials containing chromenoindoles |
| 07/15/1980 | US4212786 Crayon compositions |
| 07/15/1980 | US4212676 Compositions for solid writing materials and writing implements |
| 06/24/1980 | US4209332 Mixture of graphite, nigrosine and wax |
| 03/18/1980 | US4193906 Di- or tri-benzylidene sorbitol, solvent, dye, and a fatty acid ester |
| 01/01/1980 | CA1069082A Gel or waxy applicator articles |
| 12/04/1979 | US4176978 Pencil sheath and composition therefor |
| 09/11/1979 | CA1061975A1 Automated molding machine |
| 04/10/1979 | US4148776 Solid paints |
| 09/05/1978 | US4111702 Crayon, iron complex |
| 07/04/1978 | US4098738 Moldable compositions, metal salts, waxes, crayons |
| 04/04/1978 | US4082491 Automated molding machine |
| 03/07/1978 | US4078116 Solid paints coated substrates |
| 05/17/1977 | US4023974 Unburnt lead refill for writing and drawing pencils |
| 04/12/1977 | US4017451 Pencil lead and manufacturing method of the same |
| 11/30/1976 | US3994849 Solid paints |
| 11/30/1976 | US3994848 Solid paints |
| 11/23/1976 | US3993492 Polyoxyethylene glycols of various molecular weights, pigment, emulsifier |
| 11/23/1976 | US3993408 Pencil comprising a marking core and a porous resin sheath |
| 09/28/1976 | US3983195 Pencil sheath compositions, method for making pencils |
| 05/18/1976 | US3957495 Solid writing material |