Patents by Inventor Donald D. Schmidt

Donald D. Schmidt 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 quantitatively analyzing substances containing elements other than carbon, hydrogen and oxygen and volatile organic compounds
    Patent number: 3967928
    Abstract: Method for quantitatively analyzing substances containing elements other than carbon, hydrogen and oxygen by (1) adsorbing such substances on a particulate, substantially dust and contaminant free carbonized product prepared by (A) first partially dehydrochlorinating a normally crystalline vinylidene chloride polymer at temperatures below the melting point of such polymer to an extent of at least about 5 percent of theoretical HCl loss, then (B) completing the dehydrochlorination of such material, in the substantial absence of oxygen, by heating the material to carbonizing temperatures of from about 600.degree.C to about 1200.degree.C; then (2) analyzing the substance adsorbed on such carbonized product.
    Type: Grant
    Filed: March 22, 1974
    Date of Patent: July 6, 1976
    Assignee: The Dow Chemical Company
    Inventors: Donald D. Schmidt, Gary L. Jewett, Richard G. Melcher, Ritchie A. Wessling