Granted Patent
Utility
US 5,147,573 · App. 07/617,956
Superparamagnetic liquid colloids
Inventor:
Mark S. Chagnon
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Nov 26, 1990
Inventor
Mark S. Chagnon
Assignee (at issue)
OmniQuest Ltd.
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.