Granted Patent
Utility
US 4,604,222 · App. 06/736,388
Stable ferrofluid composition and method of making and using same
Inventors:
Lucian Borduz, Kuldip Raj
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: May 21, 1985
Inventors
Lucian Borduz
Kuldip Raj
Assignee (at issue)
Ferrofluidics 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.