Granted Patent
Utility
US 5,989,526 · App. 09/019,261
Tooth bleaching
Inventors:
Dorrit Aaslyng, Rie Tsuchiya, Abdul Gaffar, Sahar F. Smith
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: Feb 5, 1998
Inventors
Dorrit Aaslyng
Rie Tsuchiya
Abdul Gaffar
Sahar F. Smith
Assignees (at issue)
Novo Nordisk A/S
Colgate-Palmolive 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.