Patents by Inventor John W. Nebgen

John W. Nebgen 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).

  • Backfill for magnesium anodes
    Patent number: 4623435
    Abstract: A backfill composition for use with sacrificial magnesium anodes used in the cathodic protection of ferrous metal structures comprises an anion-releasing material capable of releasing fluoride, phosphate or zincate ions in water-soluble form and a magnesium-transporting adjuvant capable of transporting magnesium ion by ion exchange conduction. Suitable anion-releasing materials include calcium fluoride, cryolite, magnesium silicate and sodium silicofluoride, while suitable magnesium transporting adjuvants include bentonite clay, calcium sulfate, calcium carbonate, calcium hydroxide and magnesium silicate.
    Type: Grant
    Filed: September 1, 1983
    Date of Patent: November 18, 1986
    Assignee: Columbia Gas System Service Corporation
    Inventors: John W. Nebgen, Gary D. Hinshaw