Patents by Inventor William H. Schroeder

William H. Schroeder 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).

  • Apparatus for sampling & analysis of thermally-labile species and a method relating thereto
    Patent number: 6520033
    Abstract: An apparatus for, and a method of, sampling and analyzing thermally-labile chemical species, comprises a quartz tube having a filter member positioned in the bore of the tube. The filter member comprises a plug of quartz beads having a layer of quartz frits on either side. A fluid (gas or liquid) carrying one or more chemical substances associated with particulate matter is passed through the tube, the particulate material being collected by the quartz beads. After sample collection, the material remaining/retained from the original sample is removed, as for example by thermal desorption, and the material is then analyzed.
    Type: Grant
    Filed: March 29, 2000
    Date of Patent: February 18, 2003
    Assignee: Her Majesty the Queen in right of Canada, represented by the Minister of the Environment
    Inventors: William H. Schroeder, Julia Lu
  • Apparatus for sampling & analysis of thermally-labile species and a method relating thereto
    Publication number: 20030000318
    Abstract: An apparatus for, and a method of, sampling and analyzing thermally-labile chemical species, comprises a quartz tube having a filter member positioned in the bore of the tube. The filter member comprises a plug of quartz beads having a layer of quartz frits on either side. A fluid (gas or liquid) carrying one or more chemical substances associated with particulate matter is passed through the tube, the particulate material being collected by the quartz beads. After sample collection, the material remaining/retained from the original sample is removed, as for example by thermal desorption, and the material is then analyzed.
    Type: Application
    Filed: September 3, 2002
    Publication date: January 2, 2003
    Inventors: William H. Schroeder, Julia Lu