Granted Patent
Utility
US 6,133,351 · App. 09/464,434
Sulfur-in-oil in asphalt and polymer composition and process
Inventor:
Roger E. Hayner
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 16, 1999
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.