Granted Patent
Utility
US 5,639,932 · App. 08/451,806
Isoparaffin-olefin alkylation
Inventors:
Ronald G. Abbott, Bruce B. Randolph
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: May 26, 1995
Inventors
Ronald G. Abbott
Bruce B. Randolph
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.