Granted Patent
Utility
US 4,661,149 · App. 06/797,310
Substituted phenoxypropionaldehyde derivatives useful as herbicides
Inventor:
Muppala S. Raju
Patented Case
View Patent ↗
Granted: Apr 28, 1987
Filed: Nov 12, 1985
Inventor
Muppala S. Raju
Assignee (at issue)
PPG Industries, 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.