Measuring and testing – Gas analysis – Gas chromatography
Reexamination Certificate
2006-12-22
2010-02-09
Larkin, Daniel S (Department: 2856)
Measuring and testing
Gas analysis
Gas chromatography
C073S023250, C073S023410
Reexamination Certificate
active
07658092
ABSTRACT:
A heat switch for remote self-contained gas chromatography is disclosed. The device mechanically separates a hot or cold reservoir from the chromatography column when heating or cooling is not needed. The column needs a cooling system to obtain initial temperatures below ambient. At other times the column needs to be heated to relatively high temperatures, during which time the cooling system is preferably detached. The heat switch allows for rapid temperature changes while minimizing the peak cooling power requirement.
REFERENCES:
patent: 3581465 (1971-06-01), Haruki et al.
patent: 3910765 (1975-10-01), Tinklepaugh et al.
patent: 4038055 (1977-07-01), Varano et al.
patent: 4739654 (1988-04-01), Pilkington et al.
patent: 6029498 (2000-02-01), Walters et al.
patent: 2637685 (1990-04-01), None
patent: 01/73424 (2001-10-01), None
Colwell, J., “The Performance of a Mechanical Heat Switch at Low Temperatures”, The Review of Scientific Instruments, vol. 40, No. 9, Sep. 1969.
Kakac et al., “Heat Conduction” Third Edition, pp. 54, 57-59, Taylor & Francis 1993.
Halliday et al., “Fundamentals of Physics”, Fifth Edition, Chapter 19, Temperature, Heat, and the First Law of Thermodynamics, pp. 470-473, John Wiley & Sons, Inc. 1997.
Phillips et al., “Paraffin-Actuated Heat Switch for Mars Surface Applications”, NASA Tech Brief vol. 26, No. 5 from JPL New Technology Report NPO-30351, May 1, 2002.
Chave et al., “Magnetostrictive Heat Switch for Cryogenic Use”, NASA Tech Brief, Aug. 1999 from http://www.nasatech.com/Briefs/Aug99/NPO20274.html.
Bostrom Neil William
Daito Shigeo
Kleinberg Robert L.
Shah Jagdish
DeStefanis Jody Lynn
Larkin Daniel S
McAleenan James M.
Raybaud Helene
Schlumberger Technology Corporation
LandOfFree
Heat switch for chromatographic system and method of operation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Heat switch for chromatographic system and method of operation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heat switch for chromatographic system and method of operation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4151079