Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Reexamination Certificate
2006-09-05
2006-09-05
Larkin, Daniel S. (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
Reexamination Certificate
active
07100441
ABSTRACT:
An apparatus for monitoring the level of a liquid in a vessel comprises at least one metallic probe hermetically sealed within the vessel, the probe having a sealing end and at least a portion of the probe constituting a first electrode, the sealing end of the probe being encased within a glass material, a second electrode spaced apart from said first electrode in a manner such that the first and second electrode together form part of a capacitor, a mechanism for supplying an electrical current from an applied electrical current source to the capacitor, and a mechanism for monitoring capacitance of the capacitor.
REFERENCES:
patent: 3831069 (1974-08-01), Merrell et al.
patent: 3935740 (1976-02-01), Whitney
patent: 4010650 (1977-03-01), Piatkowski
patent: 4448072 (1984-05-01), Tward
patent: 4449405 (1984-05-01), Franz et al.
patent: 4809129 (1989-02-01), Hansen et al.
patent: 4859375 (1989-08-01), Fletcher et al.
patent: 4966207 (1990-10-01), Howard et al.
patent: 5031068 (1991-07-01), Hansen, III et al.
patent: 5701084 (1997-12-01), Borthwick, Jr. et al.
patent: 5961360 (1999-10-01), Nishimura et al.
patent: 6029717 (2000-02-01), Siegele et al.
patent: 6078729 (2000-06-01), Kopel
patent: 6148681 (2000-11-01), Gravel et al.
patent: 6341615 (2002-01-01), Zorich et al.
patent: 1 006 219 (2000-06-01), None
patent: 0650048 (2000-07-01), None
patent: 2081450 (1982-02-01), None
patent: 2212272 (1989-07-01), None
patent: 2000128181 (2000-05-01), None
EPO, International Search Report for International Application No. PCT/GB2003/002761, Oct. 31, 2003.
British Search Report dated Jun. 3, 2003, for Application No. GB 0223154.6, 1 page.
Cunning Hugh
Odedra Raj
Smith Lindsay
Williams Graham
Epichem Limited
Larkin Daniel S.
Thompson & Coburn LLP
West Paul M.
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