Granted Patent
Utility
US 5,425,366 · App. 08/072,748
Ultrasonic contrast agents for color Doppler imaging
Inventors:
Michael Reinhardt, Thomas Fritzsch, Dieter Heldmann, Joachim Siegert
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Jun 7, 1993
Inventors
Michael Reinhardt
Thomas Fritzsch
Dieter Heldmann
Joachim Siegert
Assignee (at issue)
SCHERING CORPORATION
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.