Granted Patent
Utility
US 4,515,634 · App. 06/542,798
Castable glass-ceramic composition useful as dental restorative
Inventors:
Jenn-Ming Wu, Warren R. Cannon, Carlino Panzera
Patented Case
View Patent ↗
Granted: May 7, 1985
Filed: Oct 17, 1983
Inventors
Jenn-Ming Wu
Warren R. Cannon
Carlino Panzera
Assignee (at issue)
Johnson & Johnson Dental Products Company
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.