Patents Assigned to Frontier Laboratories Ltd.
  • Publication number: 20140165840
    Abstract: There is provided a capillary column comprising a flat cross section and a desired theoretical plate number and having both high resolution and high sample load capacity. The capillary column 1 comprising a stationary phase on an inactivated inner surface, which is used in gas chromatography, comprises a narrow part 3 formed in a central part of a cross section of internal space and a bulge part 4 formed on each of both sides of the narrow part 3.
    Type: Application
    Filed: December 17, 2013
    Publication date: June 19, 2014
    Applicant: Frontier Laboratories, Ltd.
    Inventors: Chuichi Watanabe, Koichi Ito, Atsushi Watanabe
  • Patent number: 7655185
    Abstract: Provided is a polymer sample analyzer from which chemical findings on the optical deterioration of a polymer material are available in a very short time. The analyzer is equipped with a gas phase component production unit for producing a plurality of gas phase components, a carrier gas introduction unit for introducing a carrier gas into the gas phase component production unit, a separation unit for separating the gas phase components into each component, and a detection unit 5 for detecting the each component thus separated. The analyzer is equipped further with a UV irradiation unit for exposing the polymer sample to UV ray, an atmospheric gas introduction unit for introducing an atmospheric gas into the gas phase component production unit and a gas switching unit for switching a gas to be introduced into the separation unit between the carrier gas and the atmospheric gas.
    Type: Grant
    Filed: December 12, 2005
    Date of Patent: February 2, 2010
    Assignee: Frontier Laboratories Ltd.
    Inventor: Chuichi Watanabe
  • Patent number: 6444979
    Abstract: An unknown polymer is pyrolyzed by a pyrolizer and a produced mixture of pyrolytic products is separated into the pyrolytic products by a separating column. The separated pyrolytic products are detected by a mass spectrometer to generate a chromatogram. Ion intensities contained in all total ion intensities making up peaks in the chromatogram are added, for each ion of the same mass, to plot a combined mass spectrum of the unknown polymer. Combined mass spectra of a plurality of known polymers are generated in the same manner as with the combined mass spectrum of the unknown polymer, and stored as a library. The library is searched for the combined mass spectrum of one of the known polymers which agrees with a high probability percentage with the combined mass spectrum of the unknown polymer.
    Type: Grant
    Filed: July 16, 1999
    Date of Patent: September 3, 2002
    Assignee: Frontier Laboratories Ltd.
    Inventor: Chuichi Watanabe
  • Patent number: 6190613
    Abstract: A sample concentration device is provided in which a gaseous sample is concentrated by cooling a portion of a gas transfer line through which the sample is introduced into a detecting apparatus, such as a gas chromatograph or the like. The device is characterized by a cooling device for cooling a portion of the gas transfer line, which is housed in a constant temperature chamber, by spraying a coolant from a nozzle facing the portion of the gas transfer line, and by a gas flow device for creating a substantially dry gas flow through the nozzle to prevent the nozzle from becoming plugged with ice formed by freezing of moisture in the air inside the constant temperature chamber when the coolant spray is stopped. An outer jacket surrounding a portion of the gas transfer line which is subjected to cooling is also disclosed.
    Type: Grant
    Filed: April 30, 1999
    Date of Patent: February 20, 2001
    Assignee: Frontier Laboratories Ltd.
    Inventors: Chuichi Watanabe, Akihiko Hosaka, Kunitaka Sato, Masami Morikawa, Shin Tsuge