Granted Patent
Utility
US 6,166,267 · App. 09/389,340
Synthesis of n-silylated cyclopentaphenanthrene compounds
Inventor:
Fredric R. Askham
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Sep 2, 1999
Inventor
Fredric R. Askham
Assignee (at issue)
Boulder Scientific 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.