Company Filing History:
Years Active: 2021
Title: Innovations by Nicholas J Stewart
Introduction
Nicholas J Stewart is an accomplished inventor based in San Diego, CA. He has made significant contributions to the field of thermal inkjet dye sublimation inks. With a total of 2 patents, his work has advanced the technology used in printing applications.
Latest Patents
Stewart's latest patents focus on the formulation of thermal inkjet dye sublimation inks. One patent describes a thermal inkjet dye sublimation ink that consists of a disperse dye colorant dispersion, primary and secondary solvents, a chelating agent, oleth-3-phosphate, additives, and water. The colorant dispersion is present in an amount ranging from about 1 wt % actives to about 7 wt % actives. The primary solvent, which can include glycerol, ethoxylated glycerol, and dipropylene glycol, ranges from about 10 wt % to about 22 wt %. The secondary solvent can range from 0 wt % to about 7 wt %. The chelating agent is present in an amount of less than 0.1 wt % actives, while the oleth-3-phosphate is present in an amount ranging from about 0.1 wt % to about 0.75 wt %. The additives may include a buffer, a biocide, or another surfactant.
Another patent by Stewart also focuses on thermal inkjet dye sublimation inks, detailing a co-solvent system that consists of glycerol, ethoxylated glycerol, and a water-soluble organic solvent. The colorant dispersion in this formulation is similarly present in an amount ranging from about 1 wt % actives to about 7 wt % actives. The co-solvent system is present in a total amount ranging from about 12 wt % to about 25 wt %. The additives selected for this formulation include a surfactant, a chelating agent, a buffer, and a biocide.
Career Highlights
Nicholas J Stewart is currently employed at Hewlett-Packard Development Company, L.P. His work at this leading technology company has allowed him to innovate and develop advanced printing technologies.
Collaborations
Stewart has collaborated with Howard Doumaux, contributing to the development of innovative solutions in the field of ink technology.
Conclusion
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