Granted Patent
Utility
US 6,521,267 · App. 09/719,205
Tyrosinase inhibitors from plants
Inventor:
Warren F. Steck
Patented Case
View Patent ↗
Granted: Feb 18, 2003
Filed: Apr 9, 2001
Inventor
Warren F. Steck
Assignee (at issue)
Fytokem Prtoducts, 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.