Patents by Inventor Orval E. Liddell

Orval E. Liddell 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).

  • Protection of metallic structural elements against corrosion
    Patent number: 4058985
    Abstract: Apparatus for protecting a partially or fully submerged metallic structural element of irregular cross-section against corrosion from water, air or a combination of both. Filler blocks are secured to the irregular structural element to provide a uniform cross-section, and a pliable watertight and airtight encasement is wrapped around the portion of the element to be protected. Seal means are utilized to seal the edges of the encasement against water and air.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: November 22, 1977
    Inventor: Orval E. Liddell
  • Apparatus for protecting metallic structural elements against corrosion
    Patent number: 3996757
    Abstract: Apparatus for protecting a partially or fully submerged metallic structural element against corrosion from water, air or a combination of both. A pliable watertight and airtight encasement is wrapped around the portion of the element to be protected. Seal means are utilized to seal the edges of the encasement against water and air. If the encasement is of an irregular shape, fillers are secured to the structural element, such fillers having a circular configuration, and the encasement is wrapped around the fillers.
    Type: Grant
    Filed: July 22, 1974
    Date of Patent: December 14, 1976
    Inventor: Orval E. Liddell