Granted Patent
Utility
US 5,206,511 · App. 07/600,413
Calibrators for infrared-type gas analyzers
Inventors:
Jerry R. Apperson, Paul K. Graham, Leslie E. Mace, James T. Russell, Lawrence L. Labuda, Walter A. Cooke
Patented Case
View Patent ↗
Granted: Apr 27, 1993
Filed: Oct 18, 1990
Inventors
Jerry R. Apperson
Paul K. Graham
Leslie E. Mace
James T. Russell
Lawrence L. Labuda
Walter A. Cooke
Assignee (at issue)
Cascadia Technology 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.