Granted Patent
Utility
US 6,127,451 · App. 09/211,657
Dental restorative compositions
Inventor:
Xuejun Qian
Patented Case
View Patent ↗
Granted: Oct 3, 2000
Filed: Dec 15, 1998
Inventor
Xuejun Qian
Assignee (at issue)
Kerr Corporation
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.