(19)
(11) EP 1 481 108 A1

(12)

(43) Date of publication:
01.12.2004 Bulletin 2004/49

(21) Application number: 03736433.8

(22) Date of filing: 07.02.2003
(51) International Patent Classification (IPC)7C22C 38/00
(86) International application number:
PCT/US2003/003682
(87) International publication number:
WO 2003/076676 (18.09.2003 Gazette 2003/38)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT SE SI SK TR
Designated Extension States:
AL LT LV MK RO

(30) Priority: 08.02.2002 US 71688
11.02.2002 WO PCT/US00/04111

(71) Applicant: Questek Innovations LLC
Evanston, IL 60201 (US)

(72) Inventors:
  • KUEHMANN, Charles, J.
    Deerfield, IL 60015 (US)
  • OLSON, Gregory, B.
    Riverwoods, Il 60015 (US)
  • JOU, Herng-Jeng
    Wilmette, IL 60091 (US)

(74) Representative: Hall, Matthew Benjamin 
Frank B. Dehn & Co.179 Queen Victoria Street
London EC4V 4EL
London EC4V 4EL (GB)

   


(54) NANOCARBIDE PRECIPITATION STRENGTHENED ULTRAHIGH-STRENGTH, CORROSION RESISTANT, STRUCTURAL STEELS