Granted Patent
Utility
US 5,994,422 · App. 08/952,394
Hot-curing rubber foams with high structural strength
Inventors:
Peter Born, Frank Dittrich, Michael Hirthammer
Patented Case
View Patent ↗
Granted: Nov 30, 1999
Filed: Nov 18, 1997
Inventors
Peter Born
Frank Dittrich
Michael Hirthammer
Assignee (at issue)
Henkel-Teroson GmbH
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.