Granted Patent
Utility
US 4,338,231 · App. 06/200,724
Modified asphalt compositions
Inventors:
Alfred Marzocchi, Charles E. Bolen, Edward R. Harrington, Michael G. Roberts
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Oct 27, 1980
Inventors
Alfred Marzocchi
Charles E. Bolen
Edward R. Harrington
Michael G. Roberts
Assignee (at issue)
Owens-Corning Fiberglas Corp.
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.