Granted Patent
Utility
US 6,465,598 · App. 09/792,999
Urethane resins
Inventors:
Joseph S. Keute, Anne-Marie Thunnissen, Robert Tweedy
Patented Case
View Patent ↗
Granted: Oct 15, 2002
Filed: Feb 26, 2001
Inventors
Joseph S. Keute
Anne-Marie Thunnissen
Robert Tweedy
Assignee (at issue)
TENNANT COMPANY
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.