Granted Patent
Utility
US 6,447,697 · App. 09/261,497
Colorant liquid, method of use, and wildland fire retardant liquids containing same
Inventor:
Howard L. Vandersall
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Mar 3, 1999
Inventor
Howard L. Vandersall
Assignee (at issue)
Astaris L.L.C.
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.