Granted Patent
Utility
US 5,283,346 · App. 07/990,231
Dioxolanes
Inventors:
Richard Barner, Josepf Hubscher, Beat Wirz
Patented Case
View Patent ↗
Granted: Feb 1, 1994
Filed: Dec 14, 1992
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.