Granted Patent
Utility
US 5,958,822 · App. 09/043,367
Modified fluorosulfonic acids
Inventors:
Richard Beckerbauer, Mark Andrew Harmer, Qun Sun
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Mar 16, 1998
Inventors
Richard Beckerbauer
Mark Andrew Harmer
Qun Sun
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.