Patents by Inventor Douglas A. Stolk

Douglas A. Stolk 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).

  • Abrasion-resistant refrigeration-hardenable white cast iron
    Patent number: 3941589
    Abstract: A tough abrasion-resistant refrigeration-hardenable white cast iron containing as its essential alloying constituents about 2.5% to about 3.5% carbon, about 2.5% to about 3.5% manganese, about 12% to about 22% chromium, about 1% to about 2% silicon, about 1.5% to about 3.0% molybdenum, about 1% to about 2% copper, and the balance iron along with conventional residual elements and incidental impurities present in usual amounts.
    Type: Grant
    Filed: February 13, 1975
    Date of Patent: March 2, 1976
    Assignee: Amax Inc.
    Inventors: Telfer E. Norman, Douglas A. Stolk