Granted Patent
Utility
US 5,889,072 · App. 08/804,859
Process for preparing superabsorbing crosslinked polyaspartate salt
Inventor:
Yueting Chou
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Feb 24, 1997
Inventor
Yueting Chou
Assignee (at issue)
Soliton, 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.