Granted Patent
Utility
US 4,861,830 · App. 07/065,416
Polymer systems suitable for blood-contacting surfaces of a biomedical device, and methods for forming
Inventor:
Robert S. Ward
Patented Case
View Patent ↗
Granted: Aug 29, 1989
Filed: Jun 22, 1987
Inventor
Robert S. Ward
Assignee (at issue)
Th. Goldschmidt. AG
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.