Patents by Inventor Derrick P. Christman

Derrick P. Christman 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).

  • Spas and bathing systems with upgradeable and interchangeable jet stations
    Patent number: 8661576
    Abstract: A bathing system with a molded shell has hollows in the shell. A canister installed in each hollow with jets mounted upon the front jet plate of the canister. The canister is of simple construction that is mounted in a hollow and is removable and interchangeable for easy upgrading and repair of the bathing system.
    Type: Grant
    Filed: March 21, 2011
    Date of Patent: March 4, 2014
    Inventors: David J. Ludlow, Alan L. Robins, Trent L. Taylor, Derrick P. Christman, Michael J. Adams, Stephen M. Fleischer, Richard Alex Eddington, Marvin H. Howell
  • SPAS AND BATHING SYSTEMS WITH UPGRADEABLE AND INTERCHANGEABLE JET STATIONS
    Publication number: 20110225720
    Abstract: A bathing system with a molded shell has hollows in the shell. A canister installed in each hollow with jets mounted upon the front jet plate of the canister. The canister is of simple construction that is mounted in a hollow and is removable and interchangeable for easy upgrading and repair of the bathing system.
    Type: Application
    Filed: March 21, 2011
    Publication date: September 22, 2011
    Inventors: Stephen M. Fleischer, Richard Alex Eddington, Marvin H. Howell, David J. Ludlow, Alan L. Robins, Trent L. Taylor, Derrick P. Christman, Michael J. Adams
  • Dental treatment tray comprising a plasticized resin for improved moldability and conformability
    Patent number: 7137814
    Abstract: A dental treatment tray used to provide a desired treatment is injection molded from a composition that includes at least one thermoplastic resin and at least plasticizer. The plasticized thermoplastic resin permits the dental treatment tray to be injection molded even while having a wall thickness less than about 0.015 inch. The plasticizer increases the melt flow index of the thermoplastic resin while in a molten state, which facilitates complete filling of the mold cavity by the thermoplastic resin. The plasticizer also softens the thermoplastic polymer while in a solidified state in order to yield a dental tray that is even more flexible and comfortable for the user to wear.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: November 21, 2006
    Assignee: Ultradent Products, Inc.
    Inventors: Dan E. Fischer, Derrick P. Christman