Granted Patent
Utility
US 5,244,949 · App. 07/797,491
Stabilized chlorine-containing polymers
Inventors:
Hermann O. Wirth, Hans Sander, Olaf Hartmann
Patented Case
View Patent ↗
Granted: Sep 14, 1993
Filed: Nov 22, 1991
Inventors
Hermann O. Wirth
Hans Sander
Olaf Hartmann
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.