Patent application 13622171 (US), filed 2012-09-18
Publication number: US20130068609A1
Title: Dividing Wall Column for Alpha-Methylstyrene and Cumene Distillation
CPC codes: B01D   3/141
C07C   7/04
C07C  15/44
Office action: rejection, dated 2015-10-15
Rejection reasons: obviousness_103
indefiniteness_112
Prior art cited: ref_id: 5905178
ref_type: patent
severity: obviousness
ref_id: 20100108487
ref_type: patent
severity: obviousness
Final disposition: rejected (2015-10-15)