Granted Patent
Utility
US 5,576,015 · App. 08/396,490
Substantially purified beta (1,3) finely ground yeast cell wall glucan composition with dermatological and nutritional uses
Inventor:
Byron A. Donzis
Patented Case
View Patent ↗
Granted: Nov 19, 1996
Filed: Mar 2, 1995
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.