Patent application 13893656 (US), filed 2013-05-14
Publication number: US20130312965A1
Title: KOBE SUB, WELLBORE TUBING STRING APPARATUS AND METHOD
CPC codes: E21B  34/063
Office action: rejection, dated 2015-10-15
Rejection reasons: anticipation_102
Prior art cited: ref_id: 3661207
ref_type: patent
severity: novelty_destroying
Final disposition: pending (2015-10-15)