Granted Patent
Utility
US 5,370,848 · App. 07/718,054
Sulfur absorbents
Inventors:
Gary A. Delzer, Randall A. Porter
Patented Case
View Patent ↗
Granted: Dec 6, 1994
Filed: Jun 20, 1991
Inventors
Gary A. Delzer
Randall A. Porter
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.