Patent application 13540236 (US), filed 2012-07-02
Publication number: US20140144051A1
Title: TRENCH FILLING MACHINE
CPC codes: E02F   5/223
B01F  33/502
Office action: rejection, dated 2015-10-16
Rejection reasons: anticipation_102
obviousness_103
Prior art cited: ref_id: 5120217
ref_type: patent
severity: novelty_destroying
ref_id: 4071226
ref_type: patent
severity: novelty_destroying
ref_id: 6439806
ref_type: patent
severity: novelty_destroying
ref_id: 5873396
ref_type: patent
severity: novelty_destroying
ref_id: 4507012
ref_type: patent
severity: novelty_destroying
Final disposition: granted (2015-10-16)