Granted Patent
Utility
US 5,260,585 · App. 07/898,840
Endpoint and/or back diffusion gas impurity detector, and method of using the same
Inventor:
Glenn M. Tom
Patented Case
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Granted: Nov 9, 1993
Filed: Jun 12, 1992
Inventor
Glenn M. Tom
Assignee (at issue)
Novapure 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.