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. 19, 2005
Filed:
Jan. 15, 2003
Raymond W. Wong, Mississauga, CA;
Marcel P. Breton, Mississauga, CA;
Christine E. Bedford, Toronto, CA;
Leonard M. Carreira, Penfield, NY (US);
Arthur M. Gooray, Penfield, NY (US);
George J. Roller, Penfield, NY (US);
Kevin Zavadil, Benalillo, NM (US);
Paul Galambos, Albuquerque, NM (US);
Joseph Crowley, Morgan Hill, CA (US);
Raymond W. Wong, Mississauga, CA;
Marcel P. Breton, Mississauga, CA;
Christine E. Bedford, Toronto, CA;
Leonard M. Carreira, Penfield, NY (US);
Arthur M. Gooray, Penfield, NY (US);
George J. Roller, Penfield, NY (US);
Kevin Zavadil, Benalillo, NM (US);
Paul Galambos, Albuquerque, NM (US);
Joseph Crowley, Morgan Hill, CA (US);
Xerox Corporation, Stamford, CT (US);
Sandia Corporation, Albuquerque, NM (US);
Abstract
The present invention relates to an ink composition including water, a solvent, a solvent-soluble dye, and a surfactant, where the ink exhibits a stable liquid microemulsion phase at a first temperature and a second temperature higher than the first temperature and has a conductivity of at most about 200 μS/cm and a dielectric constant of at least about 60, and methods of making such ink compositions. The present invention also relates to a method of making an ink composition for use in a microelectromechanical system-based fluid ejector. The method involves providing a solution or dispersion including a dye or a pigment and adding to the solution or dispersion an additive which includes a material that enhances dielectric permittivity and/or reduces conductivity under conditions effective to produce an ink composition having a conductivity of at most about 200 μS/cm and a dielectric constant of at least about 60.