Granted Patent
Utility
US 5,639,397 · App. 08/635,246
Method for suppressing dust emissions
Inventor:
Donald Carroll Roe
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: Apr 12, 1996
Inventor
Donald Carroll Roe
Assignee (at issue)
Betzdearborn, 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.