Granted Patent
Utility
US 4,263,174 · App. 06/070,935
Low coke-make FCC catalyst
Inventors:
Hosheng Tu, David C. DeCoster
Patented Case
View Patent ↗
Granted: Apr 21, 1981
Filed: Aug 29, 1979
Inventors
Hosheng Tu
David C. DeCoster
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.