Granted Patent
Utility
US 6,180,572 · App. 09/091,313
Aqueous swellable compositions of guar gum and guar gum derivatives in oleophilic liquids and their use
Inventors:
Heinz Mueller, Claus-Peter Herold, Stephan von Tapavicza
Patented Case
View Patent ↗
Granted: Jan 30, 2001
Filed: Dec 28, 1998
Inventors
Heinz Mueller
Claus-Peter Herold
Stephan von Tapavicza
Assignee (at issue)
Henkel Kommanditgesellschaft auf Aktien
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.