Granted Patent
Utility
US 4,542,253 · App. 06/607,052
Use of phosphate and thiophosphate esters neutralized with water soluble amines as ethylene furnace anti-coking antifoulants
Inventors:
Morris Kaplan, William A. Lindley
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: May 4, 1984
Inventors
Morris Kaplan
William A. Lindley
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.