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:
Apr. 08, 2014
Filed:
Mar. 30, 2012
David Charles Boris, Webster, NY (US);
Teresa Joy Hosmer, Webster, NY (US);
David Charles Boris, Webster, NY (US);
Teresa Joy Hosmer, Webster, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
An inkjet ink comprising water, colorant, and a dynamic surface active agent at an effective concentration such that the ink has a dynamic surface tension DSTat 1 second universal surface age, a dynamic surface tension DSTat 10 seconds universal surface age and a dynamic surface tension DSTat 20 minutes universal surface age, where DSTis less than each of DSTand DST, and the difference between DSTand DSTis greater than 9.2 mN/m at 21° C. or the difference between DSTand DSTis greater than 15.5 mN/m at 21° C., and wherein the static surface tension of the ink is less than 50 mN/m. Maintaining a relatively large dynamic surface tension difference between the indicated time scales yields an optical density improvement in printed images.