Patents by Inventor Wei-Sen Chu

Wei-Sen Chu 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).

  • Use of CO.sub.2 absorbant for stabilization of dried alkaline reagent in creatinine assay
    Patent number: 5610073
    Abstract: Disclosed is an improvement to the method for the detection of creatinine in which creatinine, in aqueous solution, is contacted with a dry reagent system of an indicator for creatinine. The assay is carried out at a pH above about 11.5 which is maintained by an alkaline material. The improvement involves packaging the reagent system with a material capable of absorbing CO.sub.2 and at least some ambient water vapor. This inhibits the formation of carbonic acid thereby reducing the neutralization of the alkaline reagent system during storage to increase the shelf life and decrease the variability of the system.
    Type: Grant
    Filed: September 26, 1995
    Date of Patent: March 11, 1997
    Assignee: Bayer Corporation
    Inventors: Amy H. Chu, Wei-Sen Chu, Howard A. Cooper