Granted Patent
Utility
US 6,048,988 · App. 09/216,914
Process for the production of .alpha.-tocopherol esters
Inventors:
Steffen Krill, Frank Hubner, Rainer Hahn, Horst Weigel, Klaus Huthmacher
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Dec 21, 1998
Inventors
Steffen Krill
Frank Hubner
Rainer Hahn
Horst Weigel
Klaus Huthmacher
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.