Granted Patent
Utility
US 5,756,864 · App. 08/644,883
Process for preparing D,L-menthol from D-menthol
Inventors:
Gerhard Darsow, Gerd-Michael Petruck
Patented Case
View Patent ↗
Granted: May 26, 1998
Filed: May 10, 1996
Inventors
Gerhard Darsow
Gerd-Michael Petruck
Assignee (at issue)
Bayer Aktiengesellschaft
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.