(19)
(11) EP 4 739 641 A1

(12)

(43) Date of publication:
13.05.2026 Bulletin 2026/20

(21) Application number: 24769550.5

(22) Date of filing: 29.08.2024
(51) International Patent Classification (IPC): 
C04B 35/26(2006.01)
(52) Cooperative Patent Classification (CPC):
C04B 35/2641; C04B 2235/3225; C04B 2235/3298; C04B 2235/3224; C04B 2235/3208; C04B 2235/3286; C04B 2235/3244; C04B 2235/3239; C04B 2235/764
(86) International application number:
PCT/US2024/044307
(87) International publication number:
WO 2025/049661 (06.03.2025 Gazette 2025/10)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC ME MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA
Designated Validation States:
GE KH MA MD TN

(30) Priority: 31.08.2023 US 202363579895 P

(71) Applicant: Allumax TTI, LLC
Ann Arbor, MI 48108 (US)

(72) Inventors:
  • CRUICKSHANK, David, Bowie
    Rockville, MD 20850 (US)
  • HILL, Michael, David
    Kissimmee, FL 34746 (US)
  • MACFARLANE, Iain, Alexander
    Insch, Aberdeenshire AB52 6HS (GB)
  • POLISETTY, Srinivas
    Frederick, MD 21704 (US)
  • O'DONOVAN, Rickard, Paul
    Dunmanway, Co. Cork P47NY39 (IE)

(74) Representative: Staeger & Sperling Partnerschaftsgesellschaft mbB 
Sonnenstraße 19
80331 München
80331 München (DE)

   


(54) TEMPERATURE COMPENSATED HIGH DIELECTRIC CONSTANT FERRITES CONTAINING GADOLINIUM AND BISMUTH