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US 10,814,665 B2Granted
Writing or coloring pencil
AssigneeConte
InventorsJulien Gouerec, Philippe Lefebvre
Life of this patent
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Abstract
A writing or coloring pencil has three layers obtained by co-extrusion, including an unexpanded polymer-based lead, an unexpanded intermediate protective layer surrounding the lead and comprising an ethylene (C1-C4 alkyl) acrylate copolymer, alone or as a blend with a styrene polymer, and an expanded styrene polymer-based synthetic wood material surrounding the intermediate protective layer.
Claims21
A writing or coloring pencil comprising the following three layers obtained by co-extrusion:
- an unexpanded polymer-based lead;
- an unexpanded intermediate protective layer surrounding the lead and comprising an ethylene (C1-C4 alkyl) acrylate copolymer, alone or as a blend with a styrene polymer;
- and
- an expanded styrene polymer-based synthetic wood material surrounding the intermediate protective layer.
1 more element
Dependencies are inferred from the claim text.