Granted Patent
Utility
US 4,242,098 · App. 05/921,807
Transport of aqueous coal slurries
Inventors:
David B. Braun, Stephen Drap, Henry E. Fritz, Arthur K. Ingberman
Patented Case
View Patent ↗
Granted: Dec 30, 1980
Filed: Jul 3, 1978
Inventors
David B. Braun
Stephen Drap
Henry E. Fritz
Arthur K. Ingberman
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.