Granted Patent
Utility
US 6,832,652 · App. 10/646,147
Ultra low density cementitious slurries for use in cementing of oil and gas wells
Inventors:
Robert Dillenbeck, Thomas Heinold, Murray Rogers, Windal Scott Bray
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Aug 22, 2003
Inventors
Robert Dillenbeck
Thomas Heinold
Murray Rogers
Windal Scott Bray
Assignee (at issue)
BJ SERVICES, 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.