Patents by Inventor Steven G. Tollefson

Steven G. Tollefson 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).

  • VARIABLE LENGTH FILTER ELEMENTS, APPARATUS COMPRISING SUCH FILTER ELEMENTS, AND METHODS OF MAKING AND USING SUCH ELEMENTS AND APPARATUS
    Publication number: 20180345192
    Abstract: A filter member having an elongated body with a first end, with an extension member at the first end, wherein the extension member is adjustable between a first length and a second length. In one non-limiting embodiment, the extension member is threadably moveable between the first and second lengths. A filter system includes a vessel into which is positioned the filter member. A pipeline system will include the filter system.
    Type: Application
    Filed: October 31, 2017
    Publication date: December 6, 2018
    Inventors: ALAN L CLARKE, STEVEN G TOLLEFSON
  • METHODS OF OPERATING A FILTERING APPARATUS
    Publication number: 20170151521
    Abstract: Methods for operating a device for filtering a gas stream, having a vessel partitioned into a first stage and a second stage, with an opening between stages. A filter element is positioned in the opening, with ends of the filter element extending into the first and second stages. The first member is removable from the second member while the filter element is positioned in the opening, to allow for replacement with a new clean member.
    Type: Application
    Filed: February 13, 2017
    Publication date: June 1, 2017
    Inventors: ALAN L. CLARKE, SCHUYLER S. SMITH, STEVEN G. TOLLEFSON
  • Sealing arrangement for apparatus for filtering, and methods, and products for filtering
    Patent number: 9566543
    Abstract: A device for filtering a gas stream, having a vessel partitioned into a first stage and a second stage, with an opening between stages. A filter element is positioned in the opening, with ends of the filter element extending into the first and second stages. The first member is removable from the second member while the filter element is positioned in the opening, to allow for replacement with a new clean member.
    Type: Grant
    Filed: February 23, 2012
    Date of Patent: February 14, 2017
    Assignee: JONELL FILTRATION GROUP
    Inventors: Alan L. Clarke, Schuyler S Smith, Steven G. Tollefson
  • SEALING ARRANGEMENT FOR APPARATUS FOR FILTERING, AND METHODS, AND PRODUCTS FOR FILTERING
    Publication number: 20130055693
    Abstract: A device for filtering a gas stream, having a vessel partitioned into a first stage and a second stage, with an opening between stages. A filter element is positioned in the opening, with ends of the filter element extending into the first and second stages. The first member is removable from the second member while the filter element is positioned in the opening, to allow for replacement with a new clean member.
    Type: Application
    Filed: February 23, 2012
    Publication date: March 7, 2013
    Inventors: ALAN L. CLARKE, Schuyler S. Smith, Steven G. Tollefson
  • Exhaust rinse manifold for use with a coating apparatus
    Patent number: 5972078
    Abstract: Exhaust components of a coating apparatus can be cleaned to remove coating material therein and/or can be periodically treated so as to prevent the buildup of coating material with exhaust components. Moreover, coating materials and cleaning liquids can be separated from the exhaust stream and collected to a drain. An exhaust manifold includes an integral rinsing mechanism and a fluid separator. Rinsing can be controlled automatically or manually.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: October 26, 1999
    Assignee: FSI International, Inc.
    Inventors: Jimmy D. Collins, Steven G. Tollefson