Granted Patent
Utility
US 4,132,781 · App. 05/534,229
Method for treatment of acne
Inventor:
Richard B. Stoughton
Patented Case
View Patent ↗
Granted: Jan 2, 1979
Filed: Dec 19, 1974
Inventor
Richard B. Stoughton
Assignee (at issue)
Nelson Research & Development 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.