Granted Patent
Utility
US 6,715,868 · App. 10/057,569
Direct dye inks and a method of making direct dye inks
Inventors:
Peter Schmidt, Uyen Q. Thai
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Jan 25, 2002
Inventors
Peter Schmidt
Uyen Q. Thai
Assignee (at issue)
MacDormid Colorspan, Inc.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.