Granted Patent
Utility
US 6,357,526 · App. 09/527,299
Field upgrading of heavy oil and bitumen
Inventors:
Tayseer Abdel-Halim, Murugesan Subramanian
Patented Case
View Patent ↗
Granted: Mar 19, 2002
Filed: Mar 16, 2000
Inventors
Tayseer Abdel-Halim
Murugesan Subramanian
Assignee (at issue)
Kellogg Brown & Root LLC
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.