Granted Patent
Utility
US 5,232,852 · App. 07/492,166
Process for the production of dioxolanes
Inventors:
Richard Barner, Josepf Hubscher, Beat Wirz
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Mar 13, 1990
Inventors
Richard Barner
Josepf Hubscher
Beat Wirz
Assignee (at issue)
HOFFMANN-LA ROCHE 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.