Granted Patent
Utility
US 4,747,728 · App. 06/900,048
Method for distributing an aqueous solution containing a peroxygen in clay
Inventors:
Robert D. Norris, Richard A. Brown, Joseph C. Richards
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Aug 25, 1986
Inventors
Robert D. Norris
Richard A. Brown
Joseph C. Richards
Assignee (at issue)
International Technology Group
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.