Patent application 13635720 (US), filed 2012-11-20
Publication number: US20130112433A1
Title: INJECTOR HEAD
CPC codes: E21B  19/08
E21B  19/22
E21B  33/072
Office action: rejection, dated 2015-10-14
Rejection reasons: obviousness_103
Prior art cited: ref_id: 6189609
ref_type: patent
severity: obviousness
ref_id: 20040094306
ref_type: patent
severity: obviousness
ref_id: 4655291
ref_type: patent
severity: obviousness
ref_id: 20080302530
ref_type: patent
severity: obviousness
ref_id: 20030155127
ref_type: patent
severity: obviousness
ref_id: 6450385
ref_type: patent
severity: obviousness
Final disposition: granted (2015-10-14)