Patent application 13951236 (US), filed 2013-07-25
Publication number: US20140054042A1
Title: Centre For The Preparation Of Additives For Hydraulic Fracturing Operations And Hydraulic Fracturing Process Employing The Preparation Centre
CPC codes: E21B  43/2607
B01F  33/8212
B01F  27/80
B01F  23/59
B01F  23/54
B01F  23/51
B02C  23/00
B02C  23/18
B02C  23/40
C09K   8/62
E21B  21/062
E21B  43/267
Office action: rejection, dated 2015-10-15
Rejection reasons: indefiniteness_112
double_patenting
Final disposition: granted (2015-10-15)