Granted Patent
Utility
US 5,728,291 · App. 08/594,627
Demetallation - high carbon conversion process, apparatus and asphalt products
Inventors:
Charles Benjamin Miller, Howard F. Moore, David P. Wesley, Robert H. Wombles, Carlton H. Jewitt, Roger E. Hayner, Willian H. Gilkerson, Sr., Charles R. Gannon
Patented Case
View Patent ↗
Granted: Mar 17, 1998
Filed: Feb 2, 1996
Inventors
Charles Benjamin Miller
Howard F. Moore
David P. Wesley
Robert H. Wombles
Carlton H. Jewitt
Roger E. Hayner
Willian H. Gilkerson, Sr.
Charles R. Gannon
Assignee (at issue)
Ashland, Inc.
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.