Granted Patent
Utility
US 4,479,021 · App. 06/527,923
Continuous process for producing 1,2-alkanediols
Inventors:
Heinz Issler, Rudolf Maul
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Aug 30, 1983
Inventors
Heinz Issler
Rudolf Maul
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.