Granted Patent
Utility
US 5,250,490 · App. 07/813,083
Noble metal supported on a base metal catalyst
Inventors:
James S. Ritscher, Wei T. Yang, George M. Omietanski, Robert L. Ocheltree, Earl E. Malson
Patented Case
View Patent ↗
Granted: Oct 5, 1993
Filed: Dec 24, 1991
Inventors
James S. Ritscher
Wei T. Yang
George M. Omietanski
Robert L. Ocheltree
Earl E. Malson
Assignee (at issue)
Union Carbide Chemicals & Plastics Technology LLC
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.