Granted Patent
Utility
US 4,780,233 · App. 07/093,439
Dust suppression methods and compositions
Inventor:
Donald Carroll Roe
Patented Case
View Patent ↗
Granted: Oct 25, 1988
Filed: Sep 4, 1987
Inventor
Donald Carroll Roe
Assignee (at issue)
Betz Laboratories, 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.