Granted Patent
Utility
US 6,562,928 · App. 10/175,093
Terpolymer of maleic acid, maleic anhydride and alkylvinylether
Inventor:
Krystyna Plochocka
Patented Case
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Granted: May 13, 2003
Filed: Jun 19, 2002
Inventor
Krystyna Plochocka
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.