Granted Patent
Utility
US 4,970,340 · App. 06/821,793
Amine oxide process and composition
Inventor:
Kim R. Smith
Patented Case
View Patent ↗
Granted: Nov 13, 1990
Filed: Jan 23, 1986
Inventor
Kim R. Smith
Assignee (at issue)
Ethyl 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.