Granted Patent
Utility
US 5,738,795 · App. 08/665,139
Compositions and methods for water clarification
Inventor:
Jen-Chi Chen
Patented Case
View Patent ↗
Granted: Apr 14, 1998
Filed: Jun 14, 1996
Inventor
Jen-Chi Chen
Assignee (at issue)
Betzdearborn, Inc.
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.