Granted Patent
Utility
US 6,114,501 · App. 08/994,743
Diluent recycle process
Inventors:
John D. Hottovy, Bruce E. Kreischer
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Dec 19, 1997
Inventors
John D. Hottovy
Bruce E. Kreischer
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.