Granted Patent
Utility
US 4,890,457 · App. 07/000,095
Method for cryopreserving heart valves
Inventors:
Robert T. McNally, Albert E. Heacox, Kelvin G. M. Brockbank, Harvey L. Bank
Patented Case
View Patent ↗
Granted: Jan 2, 1990
Filed: Jan 2, 1987
Inventors
Robert T. McNally
Albert E. Heacox
Kelvin G. M. Brockbank
Harvey L. Bank
Assignee (at issue)
CryoLife, 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.