Granted Patent
Utility
US 4,885,005 · App. 07/020,202
Surfactant treatment of implantable biological tissue to inhibit calcification
Inventors:
Aws S. Nashef, Ahmed Ibrahim Sayed Ahmed
Patented Case
View Patent ↗
Granted: Dec 5, 1989
Filed: Feb 27, 1987
Inventors
Aws S. Nashef
Ahmed Ibrahim Sayed Ahmed
Assignee (at issue)
Baxter International 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.