Granted Patent
Utility
US 6,211,272 · App. 09/267,263
Polybutene/liquid polydiene hot melt adhesive
Inventors:
David L. Shafer, David R. Hansen, Larry McArthur Kegley, James R. Erickson
Patented Case
View Patent ↗
Granted: Apr 3, 2001
Filed: Mar 12, 1999
Inventors
David L. Shafer
David R. Hansen
Larry McArthur Kegley
James R. Erickson
Assignee (at issue)
SHELL OIL 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.