Granted Patent
Utility
US 6,214,618 · App. 09/287,793
Microcarrier beads having a styrene copolymer core and a covalently linked tri-methylamine exterior
Inventors:
William J. Hillegas, David E. Solomon, Gilbert H. Wuttke
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Apr 7, 1999
Inventors
William J. Hillegas
David E. Solomon
Gilbert H. Wuttke
Assignee (at issue)
SOLOHILL ENGINEERING, INC.
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.