Granted Patent
Utility
US 5,670,135 · App. 08/445,945
Ultrasonic contrast agent comprising carbohydrate particles
Inventor:
Ulf Schroder
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: May 22, 1995
Inventor
Ulf Schroder
Assignee (at issue)
NYCOMED IMAGING AS
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.