Granted Patent
Utility
US 6,649,670 · App. 10/321,762
Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents
Inventors:
Jeffery R. Harris, John F. Motier, Mike Callaway, George Ramsay
Patented Case
View Patent ↗
Granted: Nov 18, 2003
Filed: Dec 17, 2002
Inventors
Jeffery R. Harris
John F. Motier
Mike Callaway
George Ramsay
Assignee (at issue)
Baker Hughes Holdings 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.