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US Patent 9988546 Colour pencil lead

Patent 9988546 was granted and assigned to Conte on June, 2018 by the United States Patent and Trademark Office.

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Patent abstractTimelineTable: Further ResourcesReferences
Is a
Patent
Patent
1

Patent attributes

Patent Applicant
Conte
Conte
1
Current Assignee
Conte
Conte
1
Patent Jurisdiction
United States Patent and Trademark Office
United States Patent and Trademark Office
1
Patent Number
99885461
Patent Inventor Names
Frédéric D. Claptien1
Julien Gouerec1
Philippe Lefebvre1
Date of Patent
June 5, 2018
1
Patent Application Number
155370211
Date Filed
December 14, 2015
1
Patent Citations Received
‌
US Patent 12059484 Method for producing powder leads and products produced therewith
2
Patent Primary Examiner
‌
Haong-Vu A Nguyen-Ba
1
Patent abstract

The present invention concerns an extrudable, unexpanded color pencil lead, comprising, by weight relative to the total weight of the lead: between 25 and 45%, and advantageously between 30 and 40%, of a polyolefin; between 25 and 50%, and advantageously between 30 and 40%, of a colorless mineral filler; between 4 and 20%, and advantageously between 5 and 15%, of a pigment coated with or mixed with a polyolefin wax; between 0 and 10%, and advantageously between 2 and 10%, of an additive, and between 10 and 30%, and advantageously between 15 and 25%, of stearate chosen from magnesium stearate, calcium stearate and the mixture of same. It further concerns the color pencil comprising a lead according to the invention.

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