Patents by Inventor Norman B. Schmidt

Norman B. Schmidt 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).

  • Austenitic, non-magnetic, stainless steel alloy
    Patent number: 4818484
    Abstract: A large, austenitic, non-magnetic, stainless steel, alloy article which has been significantly warm worked between about 1500 F. and 1650 F. but not subsequently annealed, which has a 0.2% yield strength of at least about 90 ksi, and which, when formed into a U-bend, does not undergo stress corrosion cracking within about 700 hours in boiling saturated aqueous sodium chloride containing 2 weight percent (w/o) ammonium bisulfite. The alloy of the article consists essentially of about:______________________________________ Elements w/o ______________________________________ C 0.1 Max. Mn 1-11 Si 0.6 Max. Cr 18-23 Ni 14-25 Mo 2.5-6.5 Cu 2 Max. B .01 Max. N 0.15 Min. C + N .gtoreq. ##STR1## ______________________________________and the balance is essentially iron. A preferred alloy for this article contains about: ______________________________________ Elements w/o ______________________________________ C .02 Max. Mn 3.0-9.0 Si 0.5 Max. Cr 18-23 Ni 15-22 Mo 2.5-6.5 N 0.20 Min. 3 Mo + Cr .gtoreq. 29.
    Type: Grant
    Filed: November 26, 1986
    Date of Patent: April 4, 1989
    Assignee: Carpenter Technology Corporation
    Inventors: Terry A. DeBold, John H. Magee, Jr., Norman B. Schmidt
  • Large warm worked, alloy article
    Patent number: 4554028
    Abstract: A large, austenitic, non-magnetic, stainless steel, alloy article which has been significantly warm worked between about 1500.degree. F. and 1650.degree. F. but not subsequently annealed, which has a 0.2% yield strength of at least about 90 ksi, and which, when formed into a U-bend, does not undergo stress corrosion cracking within about 700 hours in boiling saturated aqueous sodium chloride containing 2 weight percent (w/o) ammonium bisulfite. The alloy of the article consists essentially of about:______________________________________ Elements w/o ______________________________________ C 0.1 Max. Mn 1-11 Si 0.6 Max. Cr 18-23 Ni 14-25 Mo 2.5-6.5 Cu 2 Max. B .01 Max. N 0.15 Min. C + N .gtoreq. ##STR1## ______________________________________and the balance is essentially iron. a preferred alloy for this article contains about: ______________________________________ Elements w/o ______________________________________ C .02 Max. Mn 3.0-9.0 Si 0.5 Max. Cr 18-23 Ni 15-22 Mo 2.5-6.5 N 0.20 Min. 3Mo + Cr .gtoreq.
    Type: Grant
    Filed: December 13, 1983
    Date of Patent: November 19, 1985
    Assignee: Carpenter Technology Corporation
    Inventors: Terry A. DeBold, John H. Magee, Jr., Norman B. Schmidt