Patents by Inventor Nikolay Tihomirov Popov

Nikolay Tihomirov Popov 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).

  • Device for the production of articles with a compact smooth skin and a cellular core from polymer materials
    Patent number: 3949905
    Abstract: An apparatus for the production of articles with a compact smooth skin and a cellular core from polymer materials, which contain blowing agents, by injection molding or extrusion wherein the apparatus contains an electric heating element within a channel through which the polymeric material is passed.
    Type: Grant
    Filed: June 5, 1974
    Date of Patent: April 13, 1976
    Assignee: Institute po Metaloznanie i Technologia na Metalite
    Inventors: Ivan Dimov Nikolov, Stefan Georgiev Semerdjiev, Dragan Iliev Nenov, Nikolay Tihomirov Popov