Granted Patent
Utility
US 6,536,595 · App. 09/847,125
Mineral ore flotation aid
Inventors:
Corey J. Kowalski, Russell A. Smith, Donald Carroll Roe
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: May 2, 2001
Inventors
Corey J. Kowalski
Russell A. Smith
Donald Carroll Roe
Assignee (at issue)
GE Betz, 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.