Granted Patent
Utility
US 5,492,630 · App. 08/342,644
Method and apparatus for dissolved air flotation with aeration
Inventors:
Mel Roshanravan, Michael W. Grosskopf
Patented Case
View Patent ↗
Granted: Feb 20, 1996
Filed: Nov 21, 1994
Inventors
Mel Roshanravan
Michael W. Grosskopf
Assignee (at issue)
Darling International, 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.