Granted Patent
Utility
US 4,293,503 · App. 06/111,146
Synthesis of polyol bis(allyl carbonate) utilizing reagent recovery and recycle
Inventor:
Elgin E. Young
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Jan 10, 1980
Inventor
Elgin E. Young
Assignee (at issue)
PPG Industries, Inc.
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.