Granted Patent
Utility
US 4,844,882 · App. 07/139,576
Concentrated stabilized microbubble-type ultrasonic imaging agent
Inventors:
Kenneth J. Widder, Peter J. Westkaemper
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Dec 29, 1987
Inventors
Kenneth J. Widder
Peter J. Westkaemper
Assignee (at issue)
Molecular Biosystems, 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.