Granted Patent
Utility
US 6,448,440 · App. 09/514,995
Methods for preparing and using diacyl ureas
Inventor:
Frank William Dean
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Feb 29, 2000
Inventor
Frank William Dean
Assignee (at issue)
Stoller Enterprises, 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.