Granted Patent
Utility
US 6,222,063 · App. 09/369,384
Process for transesterifying .alpha.-Ketocarboxylic esters
Inventors:
Curt Zimmermann, Johann Friedhuber
Patented Case
View Patent ↗
Granted: Apr 24, 2001
Filed: Aug 6, 1999
Inventors
Curt Zimmermann
Johann Friedhuber
Assignee (at issue)
DSM Fine Chemicals Austria 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.