Patents by Inventor Albert Willem Jacob Van Doorn

Albert Willem Jacob Van Doorn 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).

  • Stable aqueous carbon sol composition for determining analyte
    Patent number: 5641689
    Abstract: This invention relates to a composition for use in a method for determining the presence or amount of an analyte in a sample comprising a labeled constituent consisting of an aqueous carbon sol which is stable in the absence of a stabilizing substance. The colloidal carbon particles have directly conjugated to their surface a binding component which specifically binds to the analyte and the resulting analyte/carbon particle complex is used as an indication of the presence or amount of analyte in the sample. The grade of carbon used satisfies the condition V>0 wherein V is a linear predictor value according to the formula V=-138.954-0.987.times.DBP+15,609.times.VC+3.994.times.PPD, wherein DBP is the dibutylphthalate adsorption in ml/100 g, as determined according to DIN 53601; VC is the volatile content in %, as determined according to DIN 53552; and PPD is the average primary particle diameter in nanometers.
    Type: Grant
    Filed: October 20, 1995
    Date of Patent: June 24, 1997
    Assignee: Staatder Nederlande (Dienst Landbouwkundig Onderzoek (DLO)
    Inventors: Albert Willem Jacob Van Doorn, Jan Herman Wichers, Wilhelmus Martinus Jozef Van Gelder