In a classical double column flowsheet, i.e. with thermal coupling by a

Official title: {in a classical double column flowsheet, i.e. with thermal coupling by a main reboiler-condenser in the bottom of low pressure respectively top of high pressure column}

F25J3/04412 (In a classical double column flowsheet, i.e. with thermal coupling by a) appears on 737 US grants and 485 published applications in this corpus.