Granted Patent
Utility
US 6,291,681 · App. 09/780,253
Process for preparing biotin
Inventors:
Juergen Fleckenstein, Bernd Kraemer, Joachim Veits
Patented Case
View Patent ↗
Granted: Sep 18, 2001
Filed: Feb 9, 2001
Inventors
Juergen Fleckenstein
Bernd Kraemer
Joachim Veits
Assignee (at issue)
Roche Vitamins Inc.
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.