Granted Patent
Utility
US 5,090,813 · App. 07/556,744
Dual drum recycle asphalt drying and mixing method and apparatus
Inventors:
William D. McFarland, Joseph E. Musil
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Jul 23, 1990
Inventors
William D. McFarland
Joseph E. Musil
Assignee (at issue)
Cedarapids, 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.