Patent application 14357738 (US), filed 2014-05-12
Publication number: US20150083409A1
Title: ROTATIONALLY-INDEPENDENT WELLBORE RANGING
CPC codes: E21B  41/0035
E21B  47/01
E21B  47/022
E21B  47/0228
E21B  17/1078
E21B  44/005
Office action: rejection, dated 2015-10-19
Rejection reasons: obviousness_103
Prior art cited: ref_id: 20070144782
ref_type: patent
severity: obviousness
ref_id: 4072200
ref_type: patent
severity: obviousness
ref_id: 20040020691
ref_type: patent
severity: obviousness
ref_id: 20120194195
ref_type: patent
severity: obviousness
ref_id: 5265682
ref_type: patent
severity: obviousness
ref_id: 20090194333
ref_type: patent
severity: obviousness
ref_id: 5168942
ref_type: patent
severity: obviousness
ref_id: 20090194333
ref_type: patent
severity: obviousness
ref_id: 20090178850
ref_type: patent
severity: obviousness
Final disposition: pending (2015-10-19)