Granted Patent
Utility
US 4,778,840 · App. 06/096,286
Stabilized polypropylene
Inventors:
Helmut Linhart, Paul Moser
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Sep 11, 1987
Inventors
Helmut Linhart
Paul Moser
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.