Granted Patent
Utility
US 5,397,773 · App. 08/031,758
Photoprotective composition containing yeast extract
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Mar 15, 1993
Inventor
Byron A. Donzis
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.