Granted Patent
Utility
US 6,562,993 · App. 10/142,627
Preservative compounds
Inventors:
Steven H. Bertz, Samuel D'Arcangelis, Ilya Makarovskiy, John J. Merianos
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: May 10, 2002
Inventors
Steven H. Bertz
Samuel D'Arcangelis
Ilya Makarovskiy
John J. Merianos
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.