Granted Patent
Utility
US 4,844,740 · App. 07/038,065
High coking value binder system
Inventor:
Charles C. Chiu
Patented Case
View Patent ↗
Granted: Jul 4, 1989
Filed: Apr 14, 1987
Inventor
Charles C. Chiu
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.