Patent application 14128755 (US), filed 2013-12-23
Publication number: US20140124209A1
Title: GATE VALVE
CPC codes: E21B  34/04
F16K   3/0263
F16K   3/30
F16K   3/00
F16K   3/03
Office action: rejection, dated 2015-10-16
Rejection reasons: obviousness_103
Prior art cited: ref_id: 6454015
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-16)