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:
Aug. 26, 2003
Filed:
Aug. 24, 2001
Stefan Engel, Rückersdorf, DE;
J. S. Staedtler GmbH & Co., Nürnberg, DE;
Abstract
An ink set consists of several inks containing at least one of a red ink and a magenta ink, one of a blue ink and a cyan ink, and a yellow ink for piezo inkjet printers operating according to a drop-on-demand method. Each one of the inks contains at least one water-soluble dye as a principal colorant, a solvent, and one or more anti-drying agents. The solvent is substantially water. A first one of the inks contains “Direct Blue 199” as a primary or exclusive dye, a second one of the inks contains “Reactive Red 180” as a primary or exclusive dye, and a third one of the inks contains “Reactive Yellow 37” as a primary or exclusive dye. A black ink may be added to the ink set.