Granted Patent
Utility
US 4,978,724 · App. 06/948,418
Method of preparing derivatized polystyrene for spectroscopic studies
Inventor:
Brian R. Clark
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Dec 30, 1986
Inventor
Brian R. Clark
Assignee (at issue)
Applied Immune Sciences, 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.