Granted Patent
Utility
US 5,635,568 · App. 08/516,029
Reactive extrusion process for making mixed salts of polymers containing an anhydride, acid or ester side groups
Inventors:
Krystyna Plochocka, Rajiv Ginde, Jui-Chang Chuang, William E. Prosise
Patented Case
View Patent ↗
Granted: Jun 3, 1997
Filed: Aug 17, 1995
Inventors
Krystyna Plochocka
Rajiv Ginde
Jui-Chang Chuang
William E. Prosise
Assignee (at issue)
ISP INVESTMENTS LLC
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.