Granted Patent
Utility
US 5,019,393 · App. 07/227,728
Biocompatible substance with thromboresistance
Inventors:
Ralph K. Ito, Frank W. LoGerfo
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Aug 3, 1988
Inventors
Ralph K. Ito
Frank W. LoGerfo
Assignee (at issue)
New England Deaconess Hospital 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.