Granted Patent
Utility
US 6,162,442 · App. 08/741,112
Use of aqueous L-Tryptophan and/or L-Threonine salt solutions
Inventors:
Hermann Lotter, Karlheinz Drauz
Patented Case
View Patent ↗
Granted: Dec 19, 2000
Filed: Oct 30, 1996
Inventors
Hermann Lotter
Karlheinz Drauz
Assignee (at issue)
Degussa-Huels 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.