Granted Patent
Utility
US 5,104,921 · App. 07/420,716
Radiation cured polymer composition
Inventors:
James R. Erickson, Earle E. Ewins, Jr.
Patented Case
View Patent ↗
Granted: Apr 14, 1992
Filed: Oct 12, 1989
Inventors
James R. Erickson
Earle E. Ewins, Jr.
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.