Granted Patent
Utility
US 6,027,557 · App. 09/109,127
Oxidized blends of asphalt and paraffinic base stock fluxing component having improved low temperature properties
Inventor:
Roger E. Hayner
Patented Case
View Patent ↗
Granted: Feb 22, 2000
Filed: Jun 30, 1998
Inventor
Roger E. Hayner
Assignee (at issue)
Marathon Ashland Petroleum 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.