Granted Patent
Utility
US 4,515,903 · App. 06/581,272
Cracking catalyst
Inventors:
Jan Otterstedt, Sven Jaras, Roland Pudas, Lawrence L. Upson
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Feb 17, 1984
Inventors
Jan Otterstedt
Sven Jaras
Roland Pudas
Lawrence L. Upson
Assignee (at issue)
Katalistiks B.V.
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.