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:
Nov. 18, 2003
Filed:
Sep. 04, 2001
Xiaohe Chen, San Diego, CA (US);
David Tyvoll, La Jolla, CA (US);
George M. Sarkisian, San Diego, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
A waterfast, environmentally friendly ink-jet ink, is disclosed comprising from 1% to 90% by weight of a first humectant selected from the group consisting of glycerol, propanediol, and combinations thereof; from 1% to 25% by weight of a second humectant selected from the group consisting of ethylene glycol, diethylene glycol, propylene glycol, and combinations thereof; from 1% to 20% by weight of a drying agent selected from the group consisting of 1,2-hexanediol, 1,2-pentanediol, and combinations thereof; from 0% to 20% by weight of 2-pyrrolidone; from 0.05% to 10.0% by weight of a waterfastness control dye selected from the group consisting of azo-containing dyes and phthalocyanine-containing dyes; and at least one additional dye present at from about 1.0% to 10.0% by weight. If the waterfastness control dye is an azo-containing dye, such dyes can include Direct Red 227, Direct Red 254, Direct Yellow 86, and Acid Orange 7. Alternatively, if the waterfastness control dye is a phthalocyanine-containing dye, the nickel, copper or aluminum phthalocyanines can be used.