Granted Patent
Utility
US 4,689,015 · App. 06/789,360
Dental compositions
Inventors:
Robert Denyer, Michael S. Fortuin
Patented Case
View Patent ↗
Granted: Aug 25, 1987
Filed: Oct 22, 1985
Inventors
Robert Denyer
Michael S. Fortuin
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.