Granted Patent
Utility
US 5,015,777 · App. 07/430,563
Process for the preparation of aromatic beta-diketones
Inventors:
Daniel R. Chisolm, Richard A. Weiss, Leonid A. Rozov
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Nov 2, 1989
Inventors
Daniel R. Chisolm
Richard A. Weiss
Leonid A. Rozov
Assignee (at issue)
Witco 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.