Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Reexamination Certificate
2006-09-19
2006-09-19
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
C073S30400R, C073S29000R
Reexamination Certificate
active
07107838
ABSTRACT:
Apparatus and methods for employing electrical properties of water to indicate the level of filtered water in a filtered water container. The container is fitted with a hopper that holds unfiltered water. The hopper is fitted at its base with a removable and replaceable filter cartridge. Water is filtered by draining through the filter medium contained in the filter cartridge into the lower portion of the container. The water level in the lower portion of the container is monitored by means of one or more water level detector strips in the lower portion of the container. The detector strips are in electrical communication with a detection circuit and a control unit. The control unit uses the detection strips to monitor water level and uses such data to track filtered water consumption and to determine when the filter cartridge should be replaced.
REFERENCES:
patent: 1831076 (1931-11-01), Neeley
patent: 2213961 (1940-09-01), Hunter, Jr.
patent: 3038610 (1962-06-01), Hetherington
patent: 3339578 (1967-09-01), Smith
patent: 3347786 (1967-10-01), Erhardt et al.
patent: 3479281 (1969-11-01), Burgaud et al.
patent: 3503507 (1970-03-01), Raupp et al.
patent: 3586018 (1971-06-01), Bogardh et al.
patent: RE27829 (1973-12-01), Tiffany
patent: 3861565 (1975-01-01), Rickmeier, Jr.
patent: 4010650 (1977-03-01), Piatkowski, Jr.
patent: 4302337 (1981-11-01), Larson et al.
patent: 4436223 (1984-03-01), Wilson
patent: 4588500 (1986-05-01), Sprenger et al.
patent: 4590575 (1986-05-01), Emplit
patent: 4623457 (1986-11-01), Hankammer
patent: 4681677 (1987-07-01), Kuh et al.
patent: 4769135 (1988-09-01), Norton
patent: 4772386 (1988-09-01), Grout et al.
patent: 4895648 (1990-01-01), Hankammer
patent: 4986901 (1991-01-01), Nohren, Jr. et al.
patent: 4998228 (1991-03-01), Eger et al.
patent: 5190643 (1993-03-01), Duncan et al.
patent: 5296148 (1994-03-01), Colangelo et al.
patent: 5328597 (1994-07-01), Boldt et al.
patent: 5457665 (1995-10-01), Reid
patent: 5536394 (1996-07-01), Lund et al.
patent: 5560393 (1996-10-01), Clack
patent: 5637214 (1997-06-01), Kahana
patent: 5649471 (1997-07-01), Heynderickx et al.
patent: 5665224 (1997-09-01), Levene et al.
patent: 5785844 (1998-07-01), Lund et al.
patent: 5830360 (1998-11-01), Mozayeni
patent: 5873995 (1999-02-01), Huang et al.
patent: 5882507 (1999-03-01), Tanner et al.
patent: 5900138 (1999-05-01), Moretto
patent: 5900143 (1999-05-01), Dalton et al.
patent: 5928503 (1999-07-01), Shang-Chun
patent: 6024867 (2000-02-01), Parise
patent: 6033557 (2000-03-01), Gebhard et al.
patent: 6074550 (2000-06-01), Hofmann et al.
patent: 6101873 (2000-08-01), Kawakatsu et al.
patent: 6103114 (2000-08-01), Tanner et al.
patent: 6146524 (2000-11-01), Story
patent: 6214239 (2001-04-01), Renau
patent: 6224751 (2001-05-01), Hofmann et al.
patent: 6287456 (2001-09-01), Fish et al.
patent: 6296756 (2001-10-01), Hough et al.
patent: 6423224 (2002-07-01), Tanner et al.
patent: 6539797 (2003-04-01), Livingston et al.
patent: 6636151 (2003-10-01), Busick
patent: 6651824 (2003-11-01), Miller
patent: 6881327 (2005-04-01), Tanner et al.
patent: 6926821 (2005-08-01), Giordano et al.
patent: 6953523 (2005-10-01), Vandenbelt et al.
patent: 2002/0046957 (2002-04-01), Hough et al.
patent: 2002/0101346 (2002-08-01), Busick
patent: 2003/0159506 (2003-08-01), Brutschin et al.
patent: 2004/0084382 (2004-05-01), Ryazanova et al.
patent: 2004/0149032 (2004-08-01), Sell
patent: 2004/0168957 (2004-09-01), Tsataros et al.
patent: 2004/0245184 (2004-12-01), Umezawa et al.
patent: 2005/0022595 (2005-02-01), Eguchi et al.
patent: 4026634 (1992-02-01), None
patent: 4200253 (1993-07-01), None
patent: 0861809 (1998-09-01), None
patent: 1195 357 (2002-04-01), None
patent: 262045 (1926-06-01), None
patent: 2008540 (1979-06-01), None
patent: 2067888 (1981-08-01), None
patent: 2252514 (1992-08-01), None
patent: 2271106 (1994-04-01), None
patent: 2358789 (2001-08-01), None
patent: 2387229 (2003-10-01), None
patent: WO 95/04705 (1995-02-01), None
patent: WO 95/29131 (1995-11-01), None
patent: WO 96/13318 (1996-05-01), None
patent: WO 96/21621 (1996-07-01), None
patent: WO 98/05401 (1998-02-01), None
patent: WO 98/17582 (1998-04-01), None
patent: WO 98/30139 (1998-07-01), None
patent: WO 98/32705 (1998-07-01), None
patent: WO 00/66245 (2000-11-01), None
patent: WO 03/028848 (2003-04-01), None
Schwarz et al., “Electrical Engineering: An Introduction,” second edition, Oxford University Press, New York, 1993, cover page, copyright page, pp. 45-51, 64-67, 146-152, 184-188.
Chai John Y.
Chai Sunny N.
Ko Derek C.
Fook Tin Technologies Ltd.
Frank Rodney
Jenner & Block LLP
Williams Hezron
LandOfFree
Apparatus and methods for monitoring water consumption and... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and methods for monitoring water consumption and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and methods for monitoring water consumption and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3556587