Patents by Inventor Pavel I. Litvinov

Pavel I. Litvinov 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).

  • Glass-crystalline material and method of producing same
    Patent number: 4162921
    Abstract: Glass-crystalline material has dielectric properties close those of alumina ceramics (dielectric constant is 10 and dielectric loss factor (3-5) 0.10.sup.-4 at a frequency of 10.sup.10 Hz). The material contains, for example, the following ingredient in weight percent:SiO.sub.2 --31--45;Al.sub.2 O.sub.3--20--30;MgO--5--15;TiO.sub.2 --15--25;CeO.sub.2 --7.0--8.5;La.sub.2 O.sub.3 --3.0--4.6,and other oxides of rare earth elements in addition to the mentioned above -- 3.0-4.6.When producing the material, the initial glass is heated at a rate of 60.degree.-300.degree./hr up to 1,200.degree. C. and held for 3-6 hours at this temperature while crystallization proceeds.
    Type: Grant
    Filed: January 5, 1977
    Date of Patent: July 31, 1979
    Inventors: Pavel I. Litvinov, Vitaly M. Firsov, Galina B. Knyazher