Granted Patent
Utility
US 5,741,877 · App. 08/870,888
Silicone pseudogel
Inventor:
John S. Tiffany
Patented Case
View Patent ↗
Granted: Apr 21, 1998
Filed: Jun 6, 1997
Inventor
John S. Tiffany
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.