Granted Patent
Utility
US 5,215,541 · App. 06/713,204
Surfactant treatment of implantable biological tissue to inhibit calcification
Inventors:
Aws S. Nashef, Ahmed Ibrahim Sayed Ahmed
Patented Case
View Patent ↗
Granted: Jun 1, 1993
Filed: Mar 18, 1985
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.