Granted Patent
Utility
US 4,250,059 · App. 06/069,684
Catalytic composite, method of manufacture
Inventor:
Hosheng Tu
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Aug 27, 1979
Inventor
Hosheng Tu
Assignee (at issue)
UOP LLC
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.