Granted Patent
Utility
US 6,040,273 · App. 08/831,799
Diformylurea and reaction products of urea and carboxylic acids
Inventor:
Frank William Dean
Patented Case
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Granted: Mar 21, 2000
Filed: Apr 9, 1997
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.