Granted Patent
Utility
US 5,290,852 · App. 08/069,901
Glutaric acid based polyester internally plasticized PVC
Inventor:
Josef C. Vyvoda
Patented Case
View Patent ↗
Granted: Mar 1, 1994
Filed: Jun 1, 1993
Inventor
Josef C. Vyvoda
Assignee (at issue)
The Geon Company
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.