Granted Patent
Utility
US 5,534,657 · App. 08/376,176
Isoparaffin-olefin alkylation
Inventors:
Bruce B. Randolph, Ronald G. Abbott, Jonathan E. Child, Kenneth J. Del Rossi
Patented Case
View Patent ↗
Granted: Jul 9, 1996
Filed: Jan 20, 1995
Inventors
Bruce B. Randolph
Ronald G. Abbott
Jonathan E. Child
Kenneth J. Del Rossi
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.