Granted Patent
Utility
US 4,200,494 · App. 05/943,140
Method of preventing defluidization of carbonaceous particles
Inventors:
Charles R. Welter, Barry Liss, Hubert G. Davis, Charles W. Albright
Patented Case
View Patent ↗
Granted: Apr 29, 1980
Filed: Sep 18, 1978
Inventors
Charles R. Welter
Barry Liss
Hubert G. Davis
Charles W. Albright
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.