Granted Patent
Utility
US 5,977,199 · App. 09/024,858
Composition, delivery system therefor, and method for making temporary crowns and bridges
Inventor:
Xiaoyi Xie
Patented Case
View Patent ↗
Granted: Nov 2, 1999
Filed: Feb 17, 1998
Inventor
Xiaoyi Xie
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.