Patents by Inventor Marta Povazancova

Marta Povazancova 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).

  • Synergistic mixture for polyolefin stabilization
    Patent number: 4983657
    Abstract: A stabilizer composition for polymer materials, especially for polyolefin based on a combination of alkylated aralkylphenol and bis-[aralkylphenyl] pentaerythritol-diphospite.
    Type: Grant
    Filed: May 31, 1989
    Date of Patent: January 8, 1991
    Assignee: Vyskumny ustav chemickej technologie vyskumna a vyvojova organizacia
    Inventors: Antonin Humplik, Maria Benckova, Pavol Caucik, Julius Durmis, Marcela Goghova, Milan Karvas, Ivo Orlik, Marta Povazancova
  • Mixed unsaturated monocarboxylic acid esters of 2,2,6,6-tetramethyl-4-piperidinol and of its ammonium carboxylate as stabilizer against UV in polymeric materials
    Patent number: 4500446
    Abstract: A stabilization mixture is described for use with polymeric materials, the mixture evidencing high stabilization efficiency against the effect of ultraviolet radiation which being of low toxicity. The mixture comprises from 80-100%, by weight, of a mixture of 2,2,6,6-tetramethyl-4-piperidinol esters and from 0-20%, by weight, of the ammonium carboxylates thereof. The mixture is prepared by heating derivatives of 2,2,6,6-tetramethyl-4-piperidinol with mixtures of stearic, palmitic, heptadecanic, myristic and oleic acids at temperatures ranging from 150-260 degrees C.
    Type: Grant
    Filed: September 23, 1982
    Date of Patent: February 19, 1985
    Assignee: Chemicke zavody Juraja Dimitrova, narodny podnik
    Inventors: Julius Durmis, Alojz Balogh, Milan Karvas, Maria Hrachovcova, Jan Masek, Pavol Caucik, Marta Povazancova