Granted Patent
Utility
US 4,935,147 · App. 07/262,771
Particle separation method
Inventors:
Edwin F. Ullman, Vartan Ghazarossian, Nurith Kurn, Litai Weng
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Oct 26, 1988
Inventors
Edwin F. Ullman
Vartan Ghazarossian
Nurith Kurn
Litai Weng
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.