Granted Patent
Utility
US 4,333,735 · App. 06/244,205
Process and apparatus for measuring gaseous fixed nitrogen species
Inventors:
James E. Hardy, John J. Knarr
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Mar 16, 1981
Inventors
James E. Hardy
John J. Knarr
Assignee (at issue)
Exxon Research and Engineering Company
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.