Granted Patent
Utility
US 5,118,716 · App. 07/593,008
Ion exchange resins having carbodithioate groups
Inventor:
Gilles Arsenault
Patented Case
View Patent ↗
Granted: Jun 2, 1992
Filed: Oct 5, 1990
Inventor
Gilles Arsenault
Assignee (at issue)
Polysar Rubber Corporation
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.