Granted Patent
Utility
US 6,555,020 · App. 09/428,910
Stable tooth whitening gels containing high percentages of hydrogen peroxide
Inventors:
Thomas C. Chadwick, Heather L. Hunt
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Oct 28, 1999
Inventors
Thomas C. Chadwick
Heather L. Hunt
Assignee (at issue)
Den-Mat Holdings, LLC
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.