Granted Patent
Utility
US 6,152,142 · App. 09/027,109
Grafts made from amniotic membrane; methods of separating, preserving, and using such grafts in surgeries
Inventor:
Scheffer Tseng
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Feb 20, 1998
Inventor
Scheffer Tseng
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.