Measuring and testing – Liquid level or depth gauge – Hydrostatic pressure type
Reexamination Certificate
2005-08-16
2005-08-16
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Hydrostatic pressure type
C073S29000R
Reexamination Certificate
active
06928868
ABSTRACT:
An apparatus and method for monitoring a liquid level in a 4-20 mA closed loop system are provided. A process instrument and a measuring unit are powered for a predetermined time and power is provided by a battery.
REFERENCES:
patent: 3711689 (1973-01-01), Park
patent: 3909948 (1975-10-01), Markfelt
patent: 3975115 (1976-08-01), Fisher et al.
patent: 4142411 (1979-03-01), Deal
patent: 4252015 (1981-02-01), Harbon et al.
patent: 4720799 (1988-01-01), Woithe et al.
patent: 4986120 (1991-01-01), Yanagisawa et al.
patent: 5418466 (1995-05-01), Watson et al.
patent: 5455503 (1995-10-01), Kohler
patent: 5915476 (1999-06-01), Hubbell et al.
patent: 6274865 (2001-08-01), Schroer et al.
Franklin Electric, Submersible Product Overview, http://www.fele.com/Prod_tex/item8.htm.
Endress + Hauser Technical Information TI 083R/24/ae Process Display RIA 261 Apr., 2001.
Endress + Hauser Technical Information TI 060R/24/ae Process Display RIA 250 Apr., 1999.
Endress + Hauser Technical Information TI 251P/24/ae Submersible Level Transmitter Waterpilot FMX 167 Apr., 2001.
Gardner Jack
Ridenour Keith
Bose McKinney & Evans LLP
Endress & Hauser Wetzer GmbH & Co. KG
Frank Rodney T.
LandOfFree
Water well monitoring system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water well monitoring system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water well monitoring system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3514248