Granted Patent
Utility
US 4,624,775 · App. 06/663,495
Process for the production of premium coke from pyrolysis tar
Inventor:
Eric M. Dickinson
Patented Case
View Patent ↗
Granted: Nov 25, 1986
Filed: Oct 22, 1984
Inventor
Eric M. Dickinson
Assignee (at issue)
Union Carbide Corporation
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.