(19)
(11) EP 4 081 394 A1

(12)

(43) Date of publication:
02.11.2022 Bulletin 2022/44

(21) Application number: 20811878.6

(22) Date of filing: 30.10.2020
(51) International Patent Classification (IPC): 
B32B 3/26(2006.01)
B32B 5/20(2006.01)
B32B 29/00(2006.01)
E04C 2/04(2006.01)
 B32B 5/14(2006.01)
B32B 13/08(2006.01)
D21H 19/54(2006.01)
C04B 24/38(2006.01)
(52) Cooperative Patent Classification (CPC):
B32B 3/266; B32B 5/145; B32B 5/20; B32B 13/08; B32B 29/002; B32B 29/005; B32B 2250/02; B32B 2250/03; B32B 2250/26; B32B 2255/12; B32B 2255/20; B32B 2307/536; B32B 2307/546; B32B 2307/72; B32B 2307/722; B32B 2607/00; C04B 28/145; C04B 2111/0062; D21H 19/54; E04C 2/043; D21H 27/30; D21H 17/28; B32B 13/02; B32B 2250/40; B32B 2419/00; B32B 2255/24
 
C-Sets:
C04B 28/145, C04B 22/0013, C04B 22/124, C04B 38/10;
(86) International application number:
PCT/US2020/058100
(87) International publication number:
WO 2021/133463 (01.07.2021 Gazette 2021/26)
(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:
KH MA MD TN

(30) Priority: 26.12.2019 US 201962953764 P
18.06.2020 US 202016904779
26.06.2020 CA 3084939

(71) Applicant: UNITED STATES GYPSUM COMPANY
Chicago, IL 60661-3676 (US)

(72) Inventors:
  • LI, Qinghua
    Rolling Meadows, Illinois 60008 (US)
  • HEMPHILL, Mark K.
    Hawthorn Woods, Illinois 60047 (US)
  • CHRIST, Brian J.
    Burlington, Iowa 52601 (US)
  • LORING, Curtis B.
    Chicago, Illinois 60661 (US)

(74) Representative: BSB Patentanwälte Schütte & Engelen Partnerschaft mbB 
Am Markt 10
59302 Oelde
59302 Oelde (DE)

   


(54) COMPOSITE GYPSUM BOARD FORMED FROM HIGH-SALT STUCCO AND RELATED METHODS