Measuring and testing – Liquid level or depth gauge – Thermal type
Reexamination Certificate
2006-06-20
2006-06-20
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Thermal type
C073S30400R
Reexamination Certificate
active
07062965
ABSTRACT:
The present invention provides a probe having a resistance that varies with temperature and is operable to determine the quantity of a fluid, such as hydrogen, in a storage tank, such as a cryogenic storage tank. The probe relies upon differing heat transfer rates for the gaseous and liquid phases of the fluid and a change in resistance due to a change in temperature of the probe to ascertain the quantity of fluid within the storage tank. The probe can be configured to account for the geometry of the storage tank thereby providing a linearized signal indicative of the quantity of fluid in the storage tank.
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Lake Shore Cryotronics, Inc., re: Product Overview—Description and Features, www.lakeshore.com/temp/sen/prtd.html, downloaded Feb. 26, 2004 (2 pages).
Lake Shore Cryotronics, Inc., re: Product Overview (other information) www.lakeshore.com/temp/sen/prtdm.html, downloaded Feb. 26, 2004 (3 pages).
Lake Shore Cryotronics, Inc., re: Tech Specs, www.lakeshore.com/temp/sen/prtdts.html, downloaded Feb. 26, 2004 (3 pages).
Lake Shore Cryotronics, Inc., re: Sensor Packaging, www.lakeshore.com/temp/sen/pack.html, downloaded Feb. 26, 2004 (10 pages).
General Motors Corporation
Harness & Dickey & Pierce P.L.C.
West Paul M.
Williams Hezron
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