Granted Patent
Utility
US 5,340,900 · App. 08/096,136
Hardener composition for the production of polyurethane shaped articles
Inventors:
Martin Spitzer, Hans Freistadter
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Jul 22, 1993
Inventors
Martin Spitzer
Hans Freistadter
Assignee (at issue)
Ciba-Geigy
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.