Granted Patent
Utility
US 4,876,048 · App. 07/283,113
Purification of alkanesulfonyl chlorides
Inventors:
David M. Gardner, Gregory A. Wheaton, Martin Nosowitz
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Dec 12, 1988
Inventors
David M. Gardner
Gregory A. Wheaton
Martin Nosowitz
Assignee (at issue)
Pennwalt 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.