Granted Patent
Utility
US 4,554,023 · App. 06/556,201
Modified asphalt
Inventor:
Richard T. Janicki
Patented Case
View Patent ↗
Granted: Nov 19, 1985
Filed: Nov 29, 1983
Inventor
Richard T. Janicki
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.