The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 14, 1986
Filed:
Sep. 10, 1985
Applicant:
Inventor:
Seung J Lee, Daegu 635, KR;
Assignee:
Other;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 19 ; 106 23 ; 106 27 ; 106 28 ; 106 31 ; 1063 / ;
Abstract
A process for producing blackboard crayon by molding a mixture of calcium carbonate, titanium oxide and zinc oxide in place of conventional calcined gypsum or chalk, a resinous material primarily containing paraffin, beef tallow or palm oil as a coagulant, and a solvent, into a stick form. The blackboard crayon does not scatter dust.