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:
May. 02, 2017
Filed:
Oct. 25, 2011
Keshava A. Prasad, San Marcos, CA (US);
Xiaohe Chen, San Diego, CA (US);
Fereshteh Khorrami, San Diego, CA (US);
Yi-hua Tsao, San Diego, CA (US);
Dennis Z. Guo, San Diego, CA (US);
Keshava A. Prasad, San Marcos, CA (US);
Xiaohe Chen, San Diego, CA (US);
Fereshteh Khorrami, San Diego, CA (US);
Yi-Hua Tsao, San Diego, CA (US);
Dennis Z. Guo, San Diego, CA (US);
Hewlett-Packard Development Company, L.P., Houston, TX (US);
Abstract
An ink composition is disclosed herein. The ink composition includes from about 5 wt % to about 25 wt % of a co-solvent; from about 0.025 wt % to about 0.2 wt % of i) a chelating agent represented by formula 1, wherein R' is a carboxylic acid functional group or a carboxylate salt functional group and n>2; ii) a chelating agent represented by formula 2:, wherein R is a carboxylic acid functional group or a carboxylate salt functional group, m is greater than or equal to 1, x is greater than or equal to 2, y is greater than or equal to 1, and z is greater than or equal to 2; iii) a chelating agent represented by formula 3, wherein any of r, s, t, or u is a sulfonic acid functional group or a sulfonate functional group; or iv) combinations of any of i, ii, and iii. The ink composition also includes a balance of water.