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:
Jun. 05, 1990
Filed:
Dec. 12, 1988
Applicant:
Inventors:
Matthias Brenke, Hamburg, DE;
Detlef Koch, Hamburg, DE;
Assignee:
Rotring-Werke Riepe KG, Hamburg, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C09D / ;
U.S. Cl.
CPC ...
106 19 ; 106 20 ;
Abstract
A marker for felt tip pen for use on absorbent drawing materials contains an ink composition based on alkylene carbonates, or mixtures of alkylene carbonates and alkyl carbonates, as relatively high-boiling organic solvents; a water-soluble or water-dispersable dye that is virtually insoluble in the organic solvent; and water.
Brenke, Matthias. (1990). Marker or felt tip pen (U.S. Patent No. 4931093). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4931093
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile