Granted Patent
Utility
US 4,883,887 · App. 07/214,567
Sulfone polyene intermediates
Inventors:
Kurt Bernhard, Stephan Jaggli, Paul Kreienbuhl, Ulrich Schwieter
Patented Case
View Patent ↗
Granted: Nov 28, 1989
Filed: Jul 1, 1988
Inventors
Kurt Bernhard
Stephan Jaggli
Paul Kreienbuhl
Ulrich Schwieter
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.