Patent application 13750698 (US), filed 2013-01-25
Publication number: US20130192804A1
Title: DOUBLE PIPE FOR HEAT EXCHANGER
CPC codes: F28D   7/10
F28D   7/026
F28D   7/106
F28D2021/0068
F28D2021/008
F28F   1/06
Office action: rejection, dated 2015-10-14
Rejection reasons: obviousness_103
Prior art cited: ref_id: 20060096744
ref_type: patent
severity: obviousness
ref_id: 20060096314
ref_type: patent
severity: obviousness
Final disposition: rejected (2015-10-14)