Granted Patent
Utility
US 4,818,739 · App. 06/683,241
Hydrocracking catalysts and processes employing non-zeolitic molecular sieves
Inventors:
Frank P. Gortsema, Regis J. Pellet, Albert R. Springer, Jule A. Rabo, Gary N. Long
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Dec 18, 1984
Inventors
Frank P. Gortsema
Regis J. Pellet
Albert R. Springer
Jule A. Rabo
Gary N. Long
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.