Granted Patent
Utility
US 4,790,950 · App. 07/165,046
Aqueous alkali metal halogenite compositions containing a colorant stabilized by NH.sub.4 OH
Inventor:
Richard S. Hutchings
Patented Case
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Granted: Dec 13, 1988
Filed: Mar 7, 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.