Granted Patent
Utility
US 5,221,722 · App. 07/965,091
Crosslinked polyacrylic acid
Inventor:
Eugene J. Sehm
Patented Case
View Patent ↗
Granted: Jun 22, 1993
Filed: Oct 22, 1992
Inventor
Eugene J. Sehm
Assignee (at issue)
B. F. Goodrich 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.