Granted Patent
Utility
US 3,969,516 · App. 05/593,641
Composition and method for treatment of acne
Inventor:
Richard B. Stoughton
Patented Case
View Patent ↗
Granted: Jul 13, 1976
Filed: Jul 7, 1975
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.