Patents by Inventor Michael WITTPAHL

Michael WITTPAHL 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).

  • Hydroxyl-containing poly(alkylene phosphates)
    Patent number: 9969845
    Abstract: Flame retardant compositions for polyurethanes may include hydroxyl-containing poly(alkylene phosphates) that have 5 mol % or less of phosphorus from phosphorus-containing compounds having a 31P NMR resonance signal at a chemical shift in the range from 13 ppm to 18 ppm relative to 85 wt % phosphoric acid.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: May 15, 2018
    Assignee: LANXESS Deutschland GmbH
    Inventors: Jan-Gerd Hansel, Heiko Tebbe, Michael Wittpahl
  • HYDROXYL-CONTAINING POLY(ALKYLENE PHOSPHATES)
    Publication number: 20160215101
    Abstract: Flame retardant compositions for polyurethanes may include hydroxyl-containing poly(alkylene phosphates) that have 5 mol % or less of phosphorus from phosphorus-containing compounds having a 31P NMR resonance signal at a chemical shift in the range from 13 ppm to 18 ppm relative to 85 wt % phosphoric acid.
    Type: Application
    Filed: January 6, 2016
    Publication date: July 28, 2016
    Inventors: Jan-Gerd HANSEL, Heiko TEBBE, Michael WITTPAHL