Granted Patent
Utility
US 4,309,409 · App. 06/120,012
Anti-corrosion formulation for toothpastes
Inventors:
Miguel Coll-Palagos, Frances C. Benkwitt
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Feb 8, 1980
Inventors
Miguel Coll-Palagos
Frances C. Benkwitt
Assignee (at issue)
Stauffer Chemical 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.