Granted Patent
Utility
US 4,294,847 · App. 06/173,384
8-Aminoalkyl-4-alkylisopsoralens
Inventor:
Kurt D. Kaufman
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jul 29, 1980
Inventor
Kurt D. Kaufman
Assignee (at issue)
Thomas C. Elder, 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.