Patents by Inventor Dennis J. Reeder

Dennis J. Reeder 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).

  • Matrix modification in the electrophoretic separation of nucleic acids
    Patent number: 5354442
    Abstract: The present invention is a method for enhancing the separation of polynucleotides or polypeptides of various chain lengths or a mixture of polynucleotides and polypeptides of various chain lengths using electrophoretic processes to sharpen sample component zones and produce maximum resolution of electrophoretically separated macromolecules by modifying the matrix of electrophoretic gel.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: October 11, 1994
    Assignee: The United States of America as represented by the Secretary of the Commerce
    Inventors: Robert C. Allen, Dennis J. Reeder
  • Multiple lever apparatus for positioning an optical element
    Patent number: 4442524
    Abstract: A four-bar alignment adjustment mechanism with elastic hinges enables the mirrors of a gas laser to be very finely tuned with accuracy. A 50.degree. rotation of the fine-adjust knob deflects the mechanism to produce a 1% drop in power from maximum. The system has little backlash and does not use an extra-fine screw to directly move the mirror plate.
    Type: Grant
    Filed: June 3, 1982
    Date of Patent: April 10, 1984
    Assignee: Spectra-Physics, Inc.
    Inventors: Dennis J. Reeder, John S. Campbell, Keith J. Kasunic, Lee H. Laiterman