Granted Patent
Utility
US 5,382,647 · App. 08/039,363
Polyurethane-based friable sealing compound
Inventors:
Peter Daute, Roland Gruetzmacher, Rainer Hoefer, Gerhard Stoll
Patented Case
View Patent ↗
Granted: Jan 17, 1995
Filed: Apr 16, 1993
Inventors
Peter Daute
Roland Gruetzmacher
Rainer Hoefer
Gerhard Stoll
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.