Granted Patent
Utility
US 4,568,429 · App. 06/585,713
Process for the preparation of 2,4-dihydroxybenzophenones
Inventor:
Kou-Chang Liu
Patented Case
View Patent ↗
Granted: Feb 4, 1986
Filed: Mar 2, 1984
Inventor
Kou-Chang Liu
Assignee (at issue)
GAF 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.