Patents by Inventor Hu Wenzhi

Hu Wenzhi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Method for separating and analyzing ions by electrostatic ion chromatography and a zwitterionic stationary phase for ion chromatography and method for separating and analyzing analytes by multifunctional liquid chromatography
    Patent number: 5589069
    Abstract: The present invention relates to a method for separating and analyzing ions by electrostatic ion chromatography using water as the eluent not only for the analysis of the group of anions or cations but also for the simultaneous and simple analysis of the two groups of analyte ions. A solid phase packed in a separation column to be used therefor is a zwitterionic stationary phase, comprising a support carrier and a zwitterionic layer formed by directly or indirectly coating or immobilized a compound having both of a positive-charge portion and a negative-charge portion (an ammonium salt or amide portion, and a sulfonate ion portion or carboxylate ion portion) on the surface of the support carrier for detecting given separated ions by ultraviolet method etc. And another present invention relates to a method for separating and analyzing inorganic and organic components etc. simultaneously by multi-functional liquid chromatography.
    Type: Grant
    Filed: June 12, 1996
    Date of Patent: December 31, 1996
    Assignee: Soichi Inoue
    Inventor: Hu Wenzhi
  • Method for diagnosing diabetes mellitus and device therefor
    Patent number: 5500374
    Abstract: A rapid, simple and reliable method and device for diagnosing diabetes mellitus under no influence of diet. The method for diagnosing diabetes mellitus involves injecting a saliva sample from a patient suspected of having diabetes mellitus into a stationary phase in a separation column, thereafter eluting a phosphate buffer as an eluent to separate analytes contained in the saliva sample, subsequently detecting the individual separated analytes with a UV detector and electrostatic ion chromatography to produce a chromatogram, and then diagnosing diabetes mellitus based on the presence or absence of a chromato-peak of the diabetes mellitus-specific component. A zwitterionic stationary phase is employed as the stationary phase and contains a support carrier and a zwitterionic charged layer formed by coating a compound having an ammonium salt portion, a sulfonate ion portion or carboxylate ion portion on the surface of the support carrier.
    Type: Grant
    Filed: August 17, 1993
    Date of Patent: March 19, 1996
    Assignee: Soichi Inoue
    Inventor: Hu Wenzhi
  • Method for diagnosing rheumatism
    Patent number: 5484733
    Abstract: The present invention relates to a rapid, simple and reliable method and a device for diagnosing rheumatism under no influence of diet.
    Type: Grant
    Filed: August 19, 1993
    Date of Patent: January 16, 1996
    Assignee: Soichi Inoue
    Inventor: Hu Wenzhi