Granted Patent
Utility
US 5,312,980 · App. 08/055,313
Process for the separation of amino acids from aqueous solutions
Inventors:
Sems Yonsel, Wiltrud Schafer-Treffenfeldt, Akos Kiss, Elfriede Sextl, Heike Kinz
Patented Case
View Patent ↗
Granted: May 17, 1994
Filed: May 3, 1993
Inventors
Sems Yonsel
Wiltrud Schafer-Treffenfeldt
Akos Kiss
Elfriede Sextl
Heike Kinz
Assignee (at issue)
Degussa AG
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.