Granted Patent
Utility
US 5,772,893 · App. 08/696,450
Ether diphosphonate scale inhibitors
Inventors:
Peter E. Reed, Michael A. Kamrath, Phillip W. Carter, Ronald V. Davis
Patented Case
View Patent ↗
Granted: Jun 30, 1998
Filed: Aug 13, 1996
Inventors
Peter E. Reed
Michael A. Kamrath
Phillip W. Carter
Ronald V. Davis
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.