Patents by Inventor Daniel B. Carlsen

Daniel B. Carlsen 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).

  • Room temperature sterilant for medical devices
    Patent number: 5840343
    Abstract: Provided is an anti-microbial composition containing an ester of formic acid, an oxidizer, performic acid and water. Also provided is a premix for making the anti-microbial composition having two parts. One part contains the ester of formic acid and a second part contains the oxidizer. Another method is provided for making the anti-microbial composition in which the ester of formic acid is combined with the oxidizer and water. A further method is provided for sterilizing medical devices, including dialyzer filter modules, wherein the anti-microbial composition is capable of a 1:1 to a 1:12 dilution with water.
    Type: Grant
    Filed: April 8, 1997
    Date of Patent: November 24, 1998
    Assignee: Minntech Corporation
    Inventors: Robert T. Hall, II, Bradley K. Onstad, Daniel B. Carlsen
  • Dialysate filter including an asymmetric microporous, hollow fiber membrane incorporating a polyimide
    Patent number: 5605627
    Abstract: A dialysate filter including asymmetric, microporous, hollow fiber membranes incorporating a polyimide. The dialysate filter connects to the dialysis machine immediately before the dialyzer ensuring complete filtration of the dialysate, easy visual inspection, quick installation and removal, and easy disinfection of the filter.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: February 25, 1997
    Assignee: Minntech Corporation
    Inventors: Daniel B. Carlsen, Robert G. Andrus, Robert T. Hall, II
  • Dialysate filter including an asymmetric microporous, hollow fiber membrane incorporating a polyimide
    Patent number: RE36914
    Abstract: A dialysate filter including asymmetric, microporous, hollow fiber membranes incorporating a polyimide. The dialysate filter connects to the dialysis machine immediately before the dialyzer ensuring complete filtration of the dialysate, easy visual inspection, quick installation and removal, and easy disinfection of the filter.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 17, 2000
    Inventors: Daniel B. Carlsen, Robert G. Andrus, Robert T. Hall, II