Granted Patent
Utility
US 5,242,470 · App. 07/742,820
Pelletizing coal or coke with starch particles
Inventors:
James A. Salter, James P. Frederick, Edward C. Sumner, IV
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Aug 9, 1991
Inventors
James A. Salter
James P. Frederick
Edward C. Sumner, IV
Assignee (at issue)
Zeigler Coal Holding 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.