Patents by Inventor Robert T. Letarte

Robert T. Letarte 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).

  • Bioaerosol slit impaction sampling device
    Patent number: 7051605
    Abstract: A slit impaction sampling device is for collecting airborne contaminants for subsequent analysis, includes a base with a microscope slide disposed thereon. The microscopic slide has an adhesive media located thereon to assist in adhering airborne particles on the microscopic slide. The base has a top cap secured thereto. The top cap has an inlet opening formed therethrough. The inlet opening has an outer venturi section and an inner laminar section that directs the air flow through the inlet opening into contact with the adhesive media such that the airborne particles form an impaction trace thereon. The air then flows around the microscope slide into an outlet passage and to a vacuum source.
    Type: Grant
    Filed: January 25, 2002
    Date of Patent: May 30, 2006
    Assignee: Environmental Monitoring Systems, Inc.
    Inventors: Paul L. Lagraff, Robert T. Letarte
  • Bioaerosol slit impaction sampling device
    Patent number: 6463814
    Abstract: A slit impaction sampling device is for collecting airborne contaminants for subsequent analysis, includes a base with a microscope slide disposed thereon. The microscopic slide has an adhesive media located thereon to assist in adhering airborne particles on the microscopic slide. The base has a top cap secured thereto. The top cap has an inlet opening formed therethrough. The inlet opening has an outer venturi section and an inner laminar section that directs the air flow through the inlet opening into contact with the adhesive media such that the airborne particles form an impaction trace thereon. The air then flows around the microscope slide into an outlet passage and to a vacuum source.
    Type: Grant
    Filed: November 3, 2000
    Date of Patent: October 15, 2002
    Assignee: Graftech
    Inventors: Robert T. Letarte, Paul L. Lagraff
  • Bioaerosol slit impaction sampling device
    Publication number: 20020066321
    Abstract: A slit impaction sampling device is for collecting airborne contaminants for subsequent analysis, includes a base with a microscope slide disposed thereon. The microscopic slide has an adhesive media located thereon to assist in adhering airborne particles on the microscopic slide. The base has a top cap secured thereto. The top cap has an inlet opening formed therethrough. The inlet opening has an outer venturi section and an inner laminar section that directs the air flow through the inlet opening into contact with the adhesive media such that the airborne particles form an impaction trace thereon. The air then flows around the microscope slide into an outlet passage and to a vacuum source.
    Type: Application
    Filed: January 25, 2002
    Publication date: June 6, 2002
    Applicant: Graftech
    Inventors: Paul L. Lagraff, Robert T. Letarte