Granted Patent
Utility
US 5,143,645 · App. 07/595,563
Method for suppressing process dust emissions using a salt of a fatty acid as a foaming agent
Inventor:
Donald Carroll Roe
Patented Case
View Patent ↗
Granted: Sep 1, 1992
Filed: Nov 15, 1990
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.