Patent application 13396094 (US), filed 2012-02-14
Publication number: US20120312215A1
Title: BUOYANCY SYSTEM
CPC codes: B63C   7/10
B63G   8/14
B64C  25/56
B64D  25/18
E21B  19/002
Office action: rejection, dated 2015-10-16
Rejection reasons: obviousness_103
indefiniteness_112
Prior art cited: ref_id: 3146750
ref_type: patent
severity: obviousness
ref_id: 3659299
ref_type: patent
severity: obviousness
ref_id: 6789587
ref_type: patent
severity: obviousness
ref_id: 6347970
ref_type: patent
severity: obviousness
ref_id: WO 9210618
ref_type: patent
severity: obviousness
ref_id: 1024588
ref_type: patent
severity: obviousness
ref_id: 3246801
ref_type: patent
severity: obviousness
ref_id: 7882794
ref_type: patent
severity: obviousness
Final disposition: pending (2015-10-16)