Granted Patent
Utility
US 4,465,885 · App. 06/512,275
Solid phosphorus fluoride catalysts
Inventor:
Tamotsu Imai
Patented Case
View Patent ↗
Granted: Aug 14, 1984
Filed: Jul 8, 1983
Inventor
Tamotsu Imai
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.