Granted Patent
Utility
US 5,194,651 · App. 07/827,586
Tosylation of alcohols
Inventor:
Merrikh Ramezanian
Patented Case
View Patent ↗
Granted: Mar 16, 1993
Filed: Jan 29, 1992
Inventor
Merrikh Ramezanian
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.