Patents by Inventor Sven S. Folestad

Sven S. Folestad 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).

  • Laser induced fluorescence detection in modern liquid chromatography with conventional and micro columns
    Patent number: 4548498
    Abstract: In a method and a device for laser induced fluorescence detection in liquid chromatography a light beam (1) is directed from a laser source (2) towards a liquid flowing in a chosen flow direction for the detection of the presence of one or several substances. At a flow point illuminated by the light beam (1) the liquid is brought to emit a fluorescence radiation (3) which is received by a receiving unit (6). The light beam (1) is directed substantially perpendicularly to the flow direction of the liquid. The liquid is brought to pass the illuminated flow point in the form of a column with an accurately defined surface. The fluorescence radiation (3) is received in a direction which deviates from directions emanating from the illuminated flow point perpendicularly from the flow direction of the liquid column.
    Type: Grant
    Filed: January 3, 1983
    Date of Patent: October 22, 1985
    Inventors: Sven S. Folestad, Bo G. Galle, Lars Goran I. Johnson, Bjorn O. Josefsson