Granted Patent
Utility
US 5,278,342 · App. 08/025,009
Vapor phase chlorination of difluoromethyl methyl ether
Inventors:
Gerald J. O'Neill, Robert J. Bulka
Patented Case
View Patent ↗
Granted: Jan 11, 1994
Filed: Mar 15, 1993
Inventors
Gerald J. O'Neill
Robert J. Bulka
Assignee (at issue)
Hampshire Chemical Corp.
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.