Granted Patent
Utility
US 4,300,005 · App. 05/856,889
Preparation of vinyl chloride
Inventor:
Tao Li
Patented Case
View Patent ↗
Granted: Nov 10, 1981
Filed: Dec 2, 1977
Inventor
Tao Li
Assignee (at issue)
Monsanto 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.