Granted Patent
Utility
US 5,753,575 · App. 08/601,921
Method for regenerating a hydrogen fluoride and sulfone alkylation catalyst
Inventors:
Richard L. Anderson, Bruce B. Randolph, Keith W. Hovis
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Feb 15, 1996
Inventors
Richard L. Anderson
Bruce B. Randolph
Keith W. Hovis
Assignee (at issue)
Phillips Petroleum 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.