Patents by Inventor Darwin N. Sletten

Darwin N. Sletten 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).

  • Low impedance grounding electrode with universal connections and rapid access cap
    Patent number: 7462776
    Abstract: An all stainless steel grounding electrode uses a coating of stainless steel for an upper collar which has a dual purpose cable connector. The cable connector can accommodate a cable lug and bolt connection or a cad weld connection. A cap for the collar has a one quarter turn dual heavy duty thread set to prevent corrosion from locking up the cap. An osmotic material is placed and replaced in the grounding electrode via the cap.
    Type: Grant
    Filed: June 1, 2007
    Date of Patent: December 9, 2008
    Assignee: Lightning Eliminators & Consultants, Inc.
    Inventors: Peter Carpenter, legal representative, Nathan M. Mascarenas, Darwin N. Sletten, Roy B. Carpenter, Jr.
  • Grounding system for floating roofs in flammable storage tanks
    Patent number: 7078621
    Abstract: Lightning at or near the site of an oil storage tank can cause a charge build up in the tank. This charge must be discharged to ground at rapid speeds to prevent arcing, sparks and fire. The tank has a metal floating roof which can be used to discharge the charge to ground by connecting a low impedance braided wire to the floating roof, and then connecting the wire to a take up reel at the top rim of the tank. The take up reel keeps any slack out of the wire. The path to ground is liquid to floating roof, to braided wire, to take up reel, to wall of tank, to earth ground.
    Type: Grant
    Filed: January 25, 2001
    Date of Patent: July 18, 2006
    Assignee: Lightning Eliminators & Consultants, Inc.
    Inventors: Roy B. Carpenter, Jr., Darwin N. Sletten
  • Low impedance grounding electrode with universal connections and rapid access cap
    Patent number: RE42331
    Abstract: An all stainless steel grounding electrode uses a coating of stainless steel for an upper collar which has a dual purpose cable connector. The cable connector can accommodate a cable lug and bolt connection or a cad weld connection. A cap for the collar has a one quarter turn dual heavy duty thread set to prevent corrosion from locking up the cap. An osmotic material is placed and replaced in the grounding electrode via the cap.
    Type: Grant
    Filed: February 26, 2010
    Date of Patent: May 10, 2011
    Assignee: Lightning Eliminators & Consultants, Inc.
    Inventors: Roy B. Carpenter, Jr., Peter Carpenter, legal representative, Nathan M. Mascarenas, Darwin N. Sletten