(19)
(11) EP 4 061 784 A1

(12)

(43) Date of publication:
28.09.2022 Bulletin 2022/39

(21) Application number: 20811212.8

(22) Date of filing: 30.10.2020
(51) International Patent Classification (IPC): 
C04B 28/14(2006.01)
(52) Cooperative Patent Classification (CPC):
C04B 28/145; C04B 2111/0062
 
C-Sets:
C04B 28/145, C04B 22/124, C04B 22/124, C04B 22/16, C04B 24/38, C04B 38/10, C04B 2103/20, C04B 2103/30, C04B 2103/40;
(86) International application number:
PCT/US2020/058095
(87) International publication number:
WO 2021/101691 (27.05.2021 Gazette 2021/21)
(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: 22.11.2019 US 201962939264 P
18.06.2020 US 202016904756
26.06.2020 CA 3085151

(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)

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

   


(54) GYPSUM BOARD CONTAINING HIGH ABSORPTION PAPER AND RELATED METHODS