Granted Patent
Utility
US 5,227,135 · App. 07/759,105
Apparatus for simultaneous measurement of sulfur and non-sulfur containing compounds
Inventors:
Richard D. Godec, Neil Johansen, Donald H. Stedman
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Sep 6, 1991
Inventors
Richard D. Godec
Neil Johansen
Donald H. Stedman
Assignee (at issue)
Sievers Research, Inc.
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.