Patents by Inventor Stanislav A. Koltchanov

Stanislav A. Koltchanov 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).

  • Patent number: 6029475
    Abstract: Gradient refractive index elements are fabricated from the melt, using two or more molten glass compositions, to prevent bubble formation in the elements. The individual glass compositions are melted in separate containers, and then added as appropriate to a single crucible. The more dense glasses settle to the bottom of the crucible, while the less dense glasses float on top of the melt layer. As a consequence of using molten glass, no bubbles appear. Batching of the process can be done by the level of the free melt surface, which means that one can control the batched volume of the melted glass by controlling the level of the free melt surface in the crucible.
    Type: Grant
    Filed: June 30, 1998
    Date of Patent: February 29, 2000
    Assignee: LightPath Technologies, Inc.
    Inventors: Oleg Y. Abramov, Stanislav A. Koltchanov, Leila V. Laisheva