Patents by Inventor Stefanie Kreppenhofer

Stefanie Kreppenhofer has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Methods for distinguishing dioleinates of aged and non-aged olive oil
    Patent number: 9970900
    Abstract: Systems and methods are provided for selectively filtering 1,2-diolein and 1,3-dioleine ions from an olive oil sample. An ion source is instructed to ionize a mixture of an olive oil sample and a pre-ionization modifier. The pre-ionization modifier includes silver (Ag). A differential mobility spectrometry (DMS) device is instructed to separate ions received from the ion source and affected by a post-ionization modifier based on ion mobility. The second post-ionization modifier is butanol, for example. The DMS device is instructed to selectively filter separated 1,2-diolein precursor ions by selecting a first compensation voltage (CoV) for the DMS device. The first CoV is specific to separate 1,2-diolein precursor ions from 1,3-diolein precursor ions. The DMS device is instructed to selectively filter separated 1,3-diolein precursor ions by selecting a second CoV for the DMS device. The second CoV is specific to separate 1,3-diolein precursor ions from 1,2-diolein precursor ions.
    Type: Grant
    Filed: July 24, 2015
    Date of Patent: May 15, 2018
    Assignee: DH Technologies Development Pte. Ltd.
    Inventors: Stefanie Kreppenhofer, Axel Besa
  • Methods for Distinguishing Dioleinates of Aged and Non-Aged Olive Oil
    Publication number: 20170219526
    Abstract: Systems and methods are provided for selectively filtering 1,2-diolein and 1,3-dioleine ions from an olive oil sample. An ion source is instructed to ionize a mixture of an olive oil sample and a pre-ionization modifier. The pre-ionization modifier includes silver (Ag). A differential mobility spectrometry (DMS) device is instructed to separate ions received from the ion source and affected by a post-ionization modifier based on ion mobility. The second post-ionization modifier is butanol, for example. The DMS device is instructed to selectively filter separated 1,2-diolein precursor ions by selecting a first compensation voltage (CoV) for the DMS device. The first CoV is specific to separate 1,2-diolein precursor ions from 1,3-diolein precursor ions. The DMS device is instructed to selectively filter separated 1,3-diolein precursor ions by selecting a second CoV for the DMS device. The second CoV is specific to separate 1,3-diolein precursor ions from 1,2-diolein precursor ions.
    Type: Application
    Filed: July 24, 2015
    Publication date: August 3, 2017
    Inventors: Stefanie Kreppenhofer, Axel Besa