Granted Patent
Utility
US 4,876,408 · App. 07/251,752
Alkylation process using a catalyst having an increased selectivity for monoalkylation
Inventors:
Charles T. Ratcliffe, John W. Ward
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Oct 3, 1988
Inventors
Charles T. Ratcliffe
John W. Ward
Assignee (at issue)
Union Oil Company of California
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.