Patents by Inventor Alexandru Popescu

Alexandru Popescu 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).

  • Patent number: 11169087
    Abstract: Method and system in which, in order to determine foreign gases in ethylene with a degree of purity up to greater than 99%, a sample 2 of the ethylene in a measuring cell 1 is irradiated with light 14, wherein the wavelength of the light 14 is varied to scan selected absorption lines of the foreign gases in a wavelength-dependent manner, where the light 14 is detected after passing through the sample 2 to determine the concentrations of the foreign gases based on the wavelength-specific absorption of the light 14 at the points of the scanned absorption lines.
    Type: Grant
    Filed: July 21, 2017
    Date of Patent: November 9, 2021
    Assignee: Siemens Aktiengesellschaft
    Inventors: Alexandru Popescu, Thomas Hörner
  • Publication number: 20200166454
    Abstract: Method and system in which, in order to determine foreign gases in ethylene with a degree of purity up to greater than 99%, a sample 2 of the ethylene in a measuring cell 1 is irradiated with light 14, wherein the wavelength of the light 14 is varied to scan selected absorption lines of the foreign gases in a wavelength-dependent manner, where the light 14 is detected after passing through the sample 2 to determine the concentrations of the foreign gases based on the wavelength-specific absorption of the light 14 at the points of the scanned absorption lines.
    Type: Application
    Filed: July 21, 2017
    Publication date: May 28, 2020
    Inventors: Alexandru Popescu, Thomas Hörner
  • Patent number: 9446668
    Abstract: A method for driving a vehicle comprising at least two motors is provided. If a plurality of motors are fed from an intermediate circuit via inverters, the current in the intermediate circuit has a plurality of harmonics (?5th, ?3th, ?1st, +1st, +3rd, +5th). To prevent coupling capacitors of the intermediate circuit becoming over-burdened, the switching frequency of the inverters is shifted in such a manner that the harmonics no longer fall into a resonance range.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: September 20, 2016
    Assignee: SIEMENS AKTIENGESELLSCHAFT
    Inventors: Georg Bachmaier, Christian Bachmann, Dominik Bergmann, Marco Cyriacks, Matthias Gerlich, Guillaume Pais, Alexandru Popescu
  • Publication number: 20150224880
    Abstract: A method for driving a vehicle comprising at least two motors is provided. If a plurality of motors are fed from an intermediate circuit via inverters, the current in the intermediate circuit has a plurality of harmonics (?5th, ?3th, ?1st, +1st, +3rd, +5th). To prevent coupling capacitors of the intermediate circuit becoming over-burdened, the switching frequency of the inverters is shifted in such a manner that the harmonics no longer fall into a resonance range.
    Type: Application
    Filed: August 21, 2013
    Publication date: August 13, 2015
    Inventors: Georg Bachmaier, Christian Bachmann, Dominik Bergmann, Marco Cyriacks, Matthias Gerlich, Guillaume Pais, Alexandru Popescu