Granted Patent
Utility
US 4,388,408 · App. 06/219,406
Coker feedstock analysis method
Inventors:
Herbert P. Sien, Thomas J. McGinley
Patented Case
View Patent ↗
Granted: Jun 14, 1983
Filed: Dec 22, 1980
Inventors
Herbert P. Sien
Thomas J. McGinley
Assignee (at issue)
SUNTEC CO., LTD.
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.