Granted Patent
Utility
US 5,279,936 · App. 07/455,550
Method of separation employing magnetic particles and second medium
Inventor:
John Vorpahl
Patented Case
View Patent ↗
Granted: Jan 18, 1994
Filed: Dec 22, 1989
Inventor
John Vorpahl
Assignee (at issue)
Syntex (U.S.A.) LLC
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.