Patents by Inventor Don C. Christensen

Don C. Christensen 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).

  • High modulus reinforcement and dip-coat production method for same
    Patent number: 5607761
    Abstract: A fiber protective coating system for storing, handling and protecting high modulus fibers is disclosed. An exemplary system includes a plurality of generally elongated and collimated fibers comprising a fiber bundle with fibers mutually bonded by one or more coatings of a resin and formed into a cylindrical configuration of twisted fibers for feeding directly to a loom in order to form a woven fabric.
    Type: Grant
    Filed: April 7, 1995
    Date of Patent: March 4, 1997
    Assignee: Hexcel Corporation
    Inventors: Don C. Christensen, Milton F. Custer
  • High modulus fiber protective carrier systems and methods for their use
    Patent number: 5380576
    Abstract: A composite pre-slit tape useful as a protective carrier system for storing and handling high modulus fibers and processes for protecting such fibers are disclosed. An exemplary composite pre-slit tape includes a plurality of generally elongated and collimated pre-slit laminates oriented in a single plane and releasably bonded to a removable continuous backing layer which is in the form of a long thin tape. Each pre-slit laminate includes an adhesive layer located adjacent the continuous backing layer and a fiber supporting layer located adjacent the adhesive layer. In use as a fiber protective carrier, each pre-slit laminate is bonded to a fiber bundle of a plurality of collimated fibers arranged in a single layer. Each fiber is bonded along its length to the supporting layer of the pre-slit laminate. The combination of secured fibers and pre-slit laminate can be fed directly to a loom for forming woven fabric.
    Type: Grant
    Filed: January 21, 1993
    Date of Patent: January 10, 1995
    Assignee: Hexcel Corporation
    Inventors: Don C. Christensen, Milton F. Custer
  • Contacting arylene sulfide polymer with oxygen in extruder by continuous processing
    Patent number: 4532310
    Abstract: A method for continuously treating arylene sulfide polymer by passing the polymer through an extruder operated at conditions to produce mixing action at a temperature above the melting point of the polymer while contacting an amount of oxygen sufficient to produce a reduction of melt flow within a fixed residence time in the extruder.
    Type: Grant
    Filed: May 29, 1984
    Date of Patent: July 30, 1985
    Inventors: Don C. Christensen, Raymond G. Voss
  • Venting of gases
    Patent number: 4226671
    Abstract: A device for separating, collecting and returning particulate matter and/or mist entrained in gases is mounted across the vent opening. The mid-section of the device is made to communicate with the vent opening and is partially recessed therein resulting in minimum velocity of the gases escaping through either side of the device and reducing particulate build-up between working parts of the device and the vent opening.
    Type: Grant
    Filed: August 30, 1976
    Date of Patent: October 7, 1980
    Assignee: Phillips Petroleum Company
    Inventor: Don C. Christensen