Granted Patent
Utility
US 4,294,949 · App. 06/115,277
Novel polymeric compounds
Inventor:
Friedrich Karrer
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Jan 25, 1980
Inventor
Friedrich Karrer
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.