Patent application 14128103 (US), filed 2013-12-20
Publication number: US20140138884A1
Title: DEVICE FOR THE CLOSED-LOOP CONTROL OF PROCESS GASES IN A PLANT FOR PRODUCING DIRECTLY REDUCED METAL ORES
CPC codes: F27D  19/00
Y02P  10/122
Y02P  10/20
F27D  17/20
B01D  53/047
B01D  53/1475
B01D  53/75
B01D2257/504
B01D2258/025
C21B  13/002
C21B  13/02
Office action: rejection, dated 2015-10-13
Rejection reasons: obviousness_103
Prior art cited: ref_id: WO 2009037587
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-13)