Granted Patent
Utility
US 4,452,810 · App. 06/531,135
Insect repellent: N,N-diethyl-2-(4-thiochromanyloxy)-propionamide
Inventors:
Nathan S. Bunker, Rayman Y. Wong
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Sep 12, 1983
Inventors
Nathan S. Bunker
Rayman Y. Wong
Assignee (at issue)
Stauffer Chemical Company
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.