Patents by Inventor Nils M. L. Engstrom

Nils M. L. Engstrom 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).

  • Separable column for chromatography with a detection and signal device and an elution system - in combination or separate
    Patent number: 4550594
    Abstract: Separable column for chromatography consisting of surface grinded rings (5) piled inside a tube (6) which rings tighten against each other by a tightening assembly (7, 8, 9). The rings are to be packed with a chromatography gel and after a chromatography process with movable phase they are pressed out of the tube, separated and eluted. The invention also concerns an apparatus for chromatography consisting of the column and a detection and signal device (3, 4) in order to indicate the end position of the movable phase, and possibly an elution unit adapted to each separated ring.
    Type: Grant
    Filed: May 2, 1984
    Date of Patent: November 5, 1985
    Assignees: Lars G. I. Hellgren, Jan G. Vincent
    Inventor: Nils M. L. Engstrom