Granted Patent
Utility
US 4,457,954 · App. 06/297,502
Catalytic gas-sensitive elements
Inventors:
David W. Dabill, Stephen J. Gentry, Nicholas W. Hurst, Alan Jones, Peter T. Walsh
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Aug 28, 1981
Inventors
David W. Dabill
Stephen J. Gentry
Nicholas W. Hurst
Alan Jones
Peter T. Walsh
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.