Patents by Inventor William L. Scofield

William L. Scofield 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).

  • Venting tank closure
    Patent number: 4181238
    Abstract: Improvements in venting manhole covers for liquid containing vessels, tanks, containers and particularly mobile truck tanks for transporting volatile liquids; improved primary venting means enabling vessel closures to vent under internal pressures; improved spring loaded pressure relief means for tank closures.
    Type: Grant
    Filed: December 20, 1978
    Date of Patent: January 1, 1980
    Assignee: Clay & Bailey Manufacturing Company
    Inventors: Paul W. Arnold, William L. Scofield, Ronald W. Borst, Vern D. Scott