Granted Patent
Utility
US 4,720,533 · App. 06/888,124
Polyorganophosphazene curable in atmosphere
Inventor:
F. Alexander Pettigrew
Patented Case
View Patent ↗
Granted: Jan 19, 1988
Filed: Jul 22, 1986
Inventor
F. Alexander Pettigrew
Assignee (at issue)
Ethyl 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.