Granted Patent
Utility
US 6,380,451 · App. 09/474,306
Methods for restoring the heat transfer coefficient of an oligomerization reactor
Inventors:
Bruce E. Kreischer, Warren M. Ewert, Ronald D. Knudsen
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Dec 29, 1999
Inventors
Bruce E. Kreischer
Warren M. Ewert
Ronald D. Knudsen
Assignee (at issue)
Phillips Petroleum 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.