Granted Patent
Utility
US 4,670,246 · App. 06/726,735
Microencapsulated pyrethroids
Inventors:
Gerd H. Dahl, Joseph Simkin
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Apr 24, 1985
Inventors
Gerd H. Dahl
Joseph Simkin
Assignee (at issue)
Pennwalt 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.