Granted Patent
Utility
US 4,408,065 · App. 06/246,547
Process for the separation of methylparaben from wintergreen oil
Inventors:
Armand J. deRosset, James W. Priegnitz, Arthur M. Landis
Patented Case
View Patent ↗
Granted: Oct 4, 1983
Filed: Mar 23, 1981
Inventors
Armand J. deRosset
James W. Priegnitz
Arthur M. Landis
Assignee (at issue)
UOP LLC
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.