Granted Patent
Utility
US 4,912,261 · App. 07/265,780
Stable isopropenyl acetophenone solutions
Inventor:
Yozo Jujo
Patented Case
View Patent ↗
Granted: Mar 27, 1990
Filed: Nov 1, 1988
Inventor
Yozo Jujo
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.