Granted Patent
Utility
US 4,835,332 · App. 07/238,784
Use of triphenylphosphine as an ethylene furnace antifoulant
Inventor:
John C. Kisalus
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Aug 31, 1988
Inventor
John C. Kisalus
Assignee (at issue)
Nalco Chemical Company
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.