Granted Patent
Utility
US 4,296,259 · App. 06/157,574
Preparation of a 1,4-pentadien-3-ol
Inventor:
Urs Hengartner
Patented Case
View Patent ↗
Granted: Oct 20, 1981
Filed: Jun 9, 1980
Inventor
Urs Hengartner
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.