Patents by Inventor Tsvetomir Tsonev

Tsvetomir Tsonev 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).

  • PROCESS OF PRODUCING A POLYOL COMPOSITION CONTAINING POLYOLS RELEASED FROM WASTE POLYURETHANE
    Publication number: 20230399486
    Abstract: The invention relates to a process for producing a polyol composition containing polyols released from polyurethane waste, and also to a polyol composition produced using this process, and to the use thereof.
    Type: Application
    Filed: October 8, 2021
    Publication date: December 14, 2023
    Inventors: Valentin Stoychev, Tsvetomir Tsonev
  • Polyurethane gels and method for the production thereof
    Patent number: 8535572
    Abstract: Polyurethane gels are produced by converting a polyurethane system comprising (A1) one or more polyether alcohols of hydroxyl number 28 to 90 mg KOH/g produced primarily from propylene oxide added to a starter molecule of hydroxyl functionality between 2 and 4, (A2) one or more polyether alcohols of hydroxyl number 240 to 850 mg KOH/g produced primarily from propylene oxide added to a starter molecule of hydroxyl functionality between 2 and 4, (b1) one or more diisocyanates, (B2) one or more triisocyanates preferably produced by trimerisizing diisocyanates, (A3) at least one additive material fulfilling a prescribed function, and (A4) at least one additive material having a particle size in the range from 1 to 650 nm in the presence of one or more catalysts (A5) for forming polyurethane.
    Type: Grant
    Filed: March 25, 2009
    Date of Patent: September 17, 2013
    Assignee: GT Elektrotechnische Produckte GmbH
    Inventors: Tsvetomir Tsonev, Uwe Paulman, Gerhard Behrendt