Granted Patent
Utility
US 4,500,424 · App. 06/482,920
Desulfurization catalyst and process
Inventors:
Howard D. Simpson, Ryden L. Richardson, Kenneth Baron
Patented Case
View Patent ↗
Granted: Feb 19, 1985
Filed: Apr 7, 1983
Inventors
Howard D. Simpson
Ryden L. Richardson
Kenneth Baron
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.