Measuring and testing – Gas analysis
Reexamination Certificate
2005-01-04
2005-01-04
Williams, Hezron (Department: 2856)
Measuring and testing
Gas analysis
C073S023300, C340S632000, C340S603000, C340S541000, C422S083000
Reexamination Certificate
active
06837095
ABSTRACT:
A vapor sensing device that is sufficiently small and lightweight to be handheld, and also modular so as to allow the device to be conveniently adapted for use in sensing the presence and concentration of a wide variety of specified vapors. The device provides these benefits using a sensor module that incorporates a sample chamber and a plurality of sensors located on a chip releasably carried within or adjacent to the sample chamber. Optionally, the sensor module can be configured to be releasably plugged into a receptacle formed in the device. Vapors are directed to pass through the sample chamber, whereupon the sensors provide a distinct combination of electrical signals in response to each. The sensors of the sensor module can take the form of chemically sensitive resistors having resistances that vary according to the identity and concentration of an adjacent vapor. These chemically sensitive resistors can each be connected in series with a reference resistor, between a reference voltage and ground, such that an analog signal is established for each chemically sensitive resistor. The resulting analog signals are supplied to an analog-to-digital converter, to produce corresponding digital signals. These digital signals are appropriately analyzed for vapor identification. The device can then subsequently transmit the digital signals over a computer network, such as the Internet, for analysis at a remote location.
REFERENCES:
patent: 1455263 (1923-05-01), Oberfell
patent: 2743167 (1956-04-01), Cherry
patent: 3323350 (1967-06-01), Roberts
patent: 3415108 (1968-12-01), Hubner
patent: 3427862 (1969-02-01), Hubner
patent: 3529459 (1970-09-01), Vilinstras
patent: 3540261 (1970-11-01), Scoggins
patent: 4329870 (1982-05-01), Farmer
patent: 4360856 (1982-11-01), Witthaus
patent: 4660407 (1987-04-01), Takami et al.
patent: 4670405 (1987-06-01), Stetter et al.
patent: 4761639 (1988-08-01), Pyke et al.
patent: 4818348 (1989-04-01), Stetter
patent: 4835372 (1989-05-01), Gombrich et al.
patent: 4864492 (1989-09-01), Blakely-Fogel et al.
patent: 4907441 (1990-03-01), Shurmer
patent: 4922669 (1990-05-01), De Pas et al.
patent: 5025653 (1991-06-01), Schuldt
patent: 5153902 (1992-10-01), Buhl et al.
patent: 5218554 (1993-06-01), Slocum
patent: 5266944 (1993-11-01), Carroll et al.
patent: 5309777 (1994-05-01), Schmitt et al.
patent: 5390530 (1995-02-01), Hosonuma et al.
patent: 5469369 (1995-11-01), Rose-Pehrsson et al.
patent: 5500854 (1996-03-01), Uotila
patent: 5571947 (1996-11-01), Senn et al.
patent: 5579001 (1996-11-01), Dempsey et al.
patent: 5582797 (1996-12-01), Kewley et al.
patent: 5604299 (1997-02-01), Cobb
patent: 5677476 (1997-10-01), McCarthy et al.
patent: 5687734 (1997-11-01), Dempsey et al.
patent: 5708195 (1998-01-01), Kurisu et al.
patent: 5719325 (1998-02-01), Kiesele et al.
patent: 5801297 (1998-09-01), Mifsud et al.
patent: 5828851 (1998-10-01), Nixon et al.
patent: 5832411 (1998-11-01), Schatzmann et al.
patent: 5834626 (1998-11-01), De Castro et al.
patent: 5892950 (1999-04-01), Rigori et al.
patent: 5931913 (1999-08-01), Meriwether et al.
patent: 6013007 (2000-01-01), Root et al.
patent: 6052737 (2000-04-01), Bitton et al.
patent: 6061753 (2000-05-01), Ericson
patent: 6267000 (2001-07-01), Harper et al.
patent: WO 9222813 (1992-12-01), None
Boehr Christopher K.
Nakayama Robert K.
Steinthal Gregory
Sunshine Steven A.
Foley & Lardner LLP
Frank Rodney
Smiths Detection - Pasadena, Inc.
Williams Hezron
LandOfFree
Apparatus, systems and methods for detecting 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, systems and methods for detecting and..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus, systems and methods for detecting and... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3409520