Granted Patent
Utility
US 4,806,474 · App. 06/743,108
Preparation of mycelial chitosan and glucan fractions from microbial biomass
Inventor:
Donald F. Hershberger
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jun 10, 1985
Inventor
Donald F. Hershberger
Assignee (at issue)
Miles Inc.
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.