EP 1943393 A4 20140101 - ACOUSTICAL GYPSUM BOARD FOR CEILING PANEL
Title (en)
ACOUSTICAL GYPSUM BOARD FOR CEILING PANEL
Title (de)
AKUSTIKGIPSPLATTE FÜR DECKENPLATTE
Title (fr)
PLAQUE DE PLATRE ACOUSTIQUE POUR PANNEAU DE PLAFOND
Publication
Application
Priority
- US 2006038653 W 20061004
- US 26712505 A 20051104
Abstract (en)
[origin: US2007102237A1] Low density acoustical gypsum boards having a perforated cover sheet that have good sound absorption properties and are generally clear of falling gypsum dust. The invention optionally provides a cover sheet having a pattern producing a textured visual effect particularly when viewed from a distance. The acoustical gypsum boards can be produced on modified existing gypsum board lines.
IPC 8 full level
E04B 9/04 (2006.01); E04B 1/84 (2006.01); E04F 13/08 (2006.01)
CPC (source: EP KR US)
E04B 1/82 (2013.01 - KR); E04B 1/84 (2013.01 - KR); E04B 1/8409 (2013.01 - EP US); E04B 9/045 (2013.01 - EP US); E04B 9/0464 (2013.01 - EP US); E04C 2/04 (2013.01 - KR); E04F 13/0867 (2013.01 - EP US); E04F 13/148 (2013.01 - EP US); E04B 2001/8433 (2013.01 - EP US); E04B 2001/848 (2013.01 - EP US)
Citation (search report)
- [IAY] US 5922447 A 19990713 - BAIG MIRZA A [US]
- [YA] US 2004231916 A1 20041125 - ENGLERT MARK H [US], et al
- [YA] US 2668123 A 19540202 - COPELAND RANDOLPH P
- [A] US 6443258 B1 20020903 - PUTT DEAN L [US], et al
- [A] GB 664729 A 19520109 - GYPROC PRODUCTS LTD, et al
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
US 2007102237 A1 20070510; CA 2627975 A1 20070518; CA 2627975 C 20110419; CN 101535579 A 20090916; CN 101535579 B 20110907; EP 1943393 A2 20080716; EP 1943393 A4 20140101; JP 2009516094 A 20090416; KR 20080093095 A 20081020; NO 20082465 L 20080721; TW 200732540 A 20070901; WO 2007055835 A2 20070518; WO 2007055835 A3 20090507
DOCDB simple family (application)
US 26712505 A 20051104; CA 2627975 A 20061004; CN 200680041010 A 20061004; EP 06816137 A 20061004; JP 2008538889 A 20061004; KR 20087013389 A 20080603; NO 20082465 A 20080602; TW 95140580 A 20061102; US 2006038653 W 20061004