Patents by Inventor Alexandr V. Berezovsky

Alexandr V. Berezovsky 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 for the production of polyamides
    Patent number: 4124468
    Abstract: A process for the production of polyamides, which comprises polymerizing lactams in the presence of oxides of transition-metals. The process is carried out at a temperature in the range from 200.degree. to 350.degree. C in air or in an inert gaseous medium. Said process may likewise be conducted with the reactants being exposed to an ionizing radiation, e.g. gamma-radiation, which boosts the polymerization rate by 5 or more times. The end product shows good mechanical, electrical and thermophysical properties and is 10 times as wear-resistant as the prior art materials. The process of the invention gives no by-products, wastes or sewage.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: November 7, 1978
    Inventors: Vasily I. Serenkov, Jury S. Deev, Evgeny A. Ryabov, Elena V. Gorbunova, Vladimir S. Tikhomirov, Marina K. Dobrokhotova, Alexandr V. Berezovsky