Granted Patent
Utility
US 4,335,055 · App. 06/262,002
Process for the preparation of alkenylbenzene derivatives or alkenylnaphthalene derivatives
Inventors:
Hans Blaser, Dieter Reinehr, Alwyn Spencer
Patented Case
View Patent ↗
Granted: Jun 15, 1982
Filed: May 8, 1981
Inventors
Hans Blaser
Dieter Reinehr
Alwyn Spencer
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.