Granted Patent
Utility
US 5,367,104 · App. 08/213,923
Process for the purification of organic compounds contaminated by dissolved metal compounds
Inventors:
Ernst I. Leupold, Udo Dettmeier, Gustav Gimpel, Walter Reimann
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: Mar 16, 1994
Inventors
Ernst I. Leupold
Udo Dettmeier
Gustav Gimpel
Walter Reimann
Assignee (at issue)
Hoechst GmbH
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.