Granted Patent
Utility
US 4,258,177 · App. 06/083,144
Transparent copolyamide from 1,10-disubstituted C.sub.10 diamine
Inventor:
Josef Pfeifer
Patented Case
View Patent ↗
Granted: Mar 24, 1981
Filed: Oct 9, 1979
Inventor
Josef Pfeifer
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.