Granted Patent
Utility
US 5,202,035 · App. 07/834,685
Liquid aluminum phosphate salt gelling agent
Inventor:
David A. Huddleston
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Feb 12, 1992
Inventor
David A. Huddleston
Assignee (at issue)
Nalco Chemical 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.