Patents by Inventor Tsvetomi Tsonev

Tsvetomi 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).

  • POLYURETHANE GELS AND METHOD FOR THE PRODUCTION THEREOF
    Publication number: 20110140053
    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: Application
    Filed: March 25, 2009
    Publication date: June 16, 2011
    Applicant: GT ELEKTROTECHNISCHE PRODUKTE
    Inventors: Tsvetomi Tsonev, Uwe Paulmann, Gerhard Behrendt