Granted Patent
Utility
US 5,491,240 · App. 08/315,104
Quaternary compound of a tertiary amine and methyl chloride
Inventors:
Timothy C. Arnold, Robert E. Mehaffey, Jr.
Patented Case
View Patent ↗
Granted: Feb 13, 1996
Filed: Sep 29, 1994
Inventors
Timothy C. Arnold
Robert E. Mehaffey, Jr.
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.