Granted Patent
Utility
US 6,583,196 · App. 09/748,749
Curable casting compositions having a high refractive index and high impact resistance
Inventor:
Qiang Zheng
Patented Case
View Patent ↗
Granted: Jun 24, 2003
Filed: Dec 27, 2000
Inventor
Qiang Zheng
Assignee (at issue)
Rodenstock North America, 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.