Granted Patent
Utility
US 5,166,431 · App. 07/718,136
Preparation of alkanesulfonamides
Inventors:
Stanley R. Sandler, James S. Perilli, John F. Kennoy
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Jun 20, 1991
Inventors
Stanley R. Sandler
James S. Perilli
John F. Kennoy
Assignee (at issue)
Elf Atochem North America, Inc.
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.