Patent application 13250115 (US), filed 2011-09-30
Publication number: US20130081827A1
Title: MULTIZONE TREATMENT SYSTEM
CPC codes: E21B  34/142
E21B2200/06
E21B  43/14
Office action: rejection, dated 2015-10-15
Rejection reasons: obviousness_103
Prior art cited: ref_id: 4043392
ref_type: patent
severity: obviousness
ref_id: 4067388
ref_type: patent
severity: obviousness
ref_id: 6189618
ref_type: patent
severity: obviousness
ref_id: 20130168098
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-15)