Granted Patent
Utility
US 4,880,556 · App. 07/243,105
Aqueous alkali metal halogenite compositions containing a colorant
Inventor:
Richard S. Hutchings
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Sep 2, 1988
Inventor
Richard S. Hutchings
Assignee (at issue)
The Drackett Company
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.