Granted Patent
Utility
US 4,206,288 · App. 05/903,146
Microbial desulfurization of coal
Inventors:
Clifford M. Detz, George Barvinchak
Patented Case
View Patent ↗
Granted: Jun 3, 1980
Filed: May 5, 1978
Inventors
Clifford M. Detz
George Barvinchak
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.