Granted Patent
Utility
US 6,740,254 · App. 10/314,917
Glycerin triester plasticizer
Inventors:
Lei Zhou, George F. Schaefer
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Dec 9, 2002
Inventors
Lei Zhou
George F. Schaefer
Assignee (at issue)
Ferro 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.