Granted Patent
Utility
US 5,089,646 · App. 07/622,776
Bicyclic polysilicon compounds
Inventor:
Bruce C. Berris
Patented Case
View Patent ↗
Granted: Feb 18, 1992
Filed: Dec 5, 1990
Inventor
Bruce C. Berris
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.