Granted Patent
Utility
US 6,787,628 · App. 10/398,166
Polyether/polyurethane association thickeners
Inventors:
Dean Thetford, Stuart Barnett
Patented Case
View Patent ↗
Granted: Sep 7, 2004
Filed: Apr 2, 2003
Inventors
Dean Thetford
Stuart Barnett
Assignee (at issue)
Avecia Limited
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.