Granted Patent
Utility
US 6,652,774 · App. 10/027,810
Glycerin triester plasticizer
Inventors:
Lei Zhou, George F. Schaefer, William W. Knickmeyer, David Paul
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Dec 20, 2001
Inventors
Lei Zhou
George F. Schaefer
William W. Knickmeyer
David Paul
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.