Granted Patent
Utility
US 6,016,867 · App. 09/103,770
Upgrading and recovery of heavy crude oils and natural bitumens by in situ hydrovisbreaking
Inventors:
Armand A. Gregoli, Daniel P. Rimmer, Dennis J. Graue
Patented Case
View Patent ↗
Granted: Jan 25, 2000
Filed: Jun 24, 1998
Inventors
Armand A. Gregoli
Daniel P. Rimmer
Dennis J. Graue
Assignee (at issue)
World Energy Systems Incorporated
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.