Patent application 13812335 (US), filed 2013-01-25
Publication number: US20130119589A1
Title: Hearth for a Metallurgical Furnace Having an Improved Wall Lining
CPC codes: F27B   1/14
C21B   7/06
C21C   5/44
F27D   1/0006
F27D   1/14
Office action: rejection, dated 2015-10-16
Rejection reasons: obviousness_103
indefiniteness_112
Prior art cited: ref_id: 20070267789
ref_type: patent
severity: obviousness
ref_id: 6875716
ref_type: patent
severity: obviousness
ref_id: 2022229
ref_type: patent
severity: obviousness
ref_id: 3953007
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-16)