Granted Patent
Utility
US 4,290,942 · App. 06/108,858
Heat-stabilized chlorine-containing thermoplastic
Inventors:
Rainer Schneider, Gerd Abeler
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Dec 31, 1979
Inventors
Rainer Schneider
Gerd Abeler
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.