(19)
(11) EP 3 423 235 A1

(12)

(43) Date of publication:
09.01.2019 Bulletin 2019/02

(21) Application number: 17709891.0

(22) Date of filing: 27.02.2017
(51) International Patent Classification (IPC): 
B24D 5/14(2006.01)
B24D 7/14(2006.01)
(86) International application number:
PCT/US2017/019670
(87) International publication number:
WO 2017/151498 (08.09.2017 Gazette 2017/36)
(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 MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
MA MD

(30) Priority: 03.03.2016 US 201662302977 P

(71) Applicant: 3M Innovative Properties Company
St. Paul, MN 55133-3427 (US)

(72) Inventors:
  • VAN, Loc X.
    Saint Paul Minnesota 55133-3427 (US)
  • NGUYEN, Thu A.
    Saint Paul Minnesota 55133-3427 (US)

(74) Representative: Vossius & Partner Patentanwälte Rechtsanwälte mbB 
Siebertstrasse 3
81675 München
81675 München (DE)

   


(54) DEPRESSED CENTER GRINDING WHEEL