Granted Patent
Utility
US 5,449,463 · App. 08/212,455
Desalter wash water additive
Inventors:
Phillip L. Elliott, Michael L. Braden, Donald J. Newman
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Mar 11, 1994
Inventors
Phillip L. Elliott
Michael L. Braden
Donald J. Newman
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.