Granted Patent
Utility
US 5,525,516 · App. 08/315,386
Method for tagging petroleum products
Inventors:
James J. Krutak, Michael R. Cushman, Max A. Weaver
Patented Case
View Patent ↗
Granted: Jun 11, 1996
Filed: Sep 30, 1994
Inventors
James J. Krutak
Michael R. Cushman
Max A. Weaver
Assignee (at issue)
Eastman Chemical Company
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.