Granted Patent
Utility
US 6,413,897 · App. 09/528,977
Method for regenerating an alkylation catalyst
Inventors:
Bruce B. Randolph, Marvin M. Johnson
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Mar 21, 2000
Inventors
Bruce B. Randolph
Marvin M. Johnson
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.