Patents by Inventor Doreen Siegemund

Doreen Siegemund 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).

  • Method for purifying IgG
    Patent number: 10144774
    Abstract: The invention relates to a modified process for the purification of IgG, improving the yield of IgG per liter of starting material without compromising the quality of the product.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: December 4, 2018
    Assignee: CSL BEHRING AG
    Inventors: Ibrahim El Menyawi, Doreen Siegemund
  • Process for enriching IgA
    Patent number: 9828418
    Abstract: The invention relates to a process for enriching IgA (and IgM) from IgA-comprising material. In particular, it relates to a sequential elution process of an anion exchanger that leads to an advantageous enrichment and separation of monomeric and dimeric IgA.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: November 28, 2017
    Assignee: CSL BEHRING AG
    Inventors: Ibrahim El Menyawi, Marius Loetscher, Doreen Siegemund
  • PROCESS
    Publication number: 20160368970
    Abstract: The invention relates to a modified process for the purification of IgG, improving the yield of IgG per liter of starting material without compromising the quality of the product.
    Type: Application
    Filed: July 1, 2014
    Publication date: December 22, 2016
    Applicant: CSL BEHRING AG
    Inventors: Ibrahim EL MENYAWI, Doreen SIEGEMUND
  • PROCESS FOR ENRICHING IGA
    Publication number: 20150005476
    Abstract: The invention relates to a process for enriching IgA (and IgM) from IgA-comprising material. In particular, it relates to a sequential elution process of an anion exchanger that leads to an advantageous enrichment and separation of monomeric and dimeric IgA.
    Type: Application
    Filed: March 8, 2013
    Publication date: January 1, 2015
    Applicant: CSL Behring AG
    Inventors: Ibrahim El Menyawi, Marius Loetscher, Doreen Siegemund