Granted Patent
Utility
US 4,863,884 · App. 07/199,872
Method for rejuvenating used catalysts
Inventors:
Kenneth G. Tasker, John Milligan
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: May 25, 1988
Inventors
Kenneth G. Tasker
John Milligan
Assignee (at issue)
HRI
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.