Patents by Inventor Boris A. Konstantinov

Boris A. Konstantinov 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).

  • Bioprosthetic heart valve, methods and device for preparation thereof
    Patent number: 4692164
    Abstract: A bioprosthetic heart valve comprising a biological transplant on a frame nsisting of a supporting ring with struts extending therefrom over a toroidal surface and connected with said ring by arcuate portions of an additional ring, a covering made from a biologically inert material with an isolation spacer, which form a toroidal envelope, the biological transplant secured to the covered-up frame having envelopes shaped like aortic sinuses, joining smoothly the cusps whose number corresponds to the number of envelopes; a method of preparing the biological transplant from the aortic valve of an animal or human being comprising the dissection of the aortic root with aortic valve and cutting out a transplant with cusps, fibrous ring and aortic sinuses from a flap of biological tissue with the aid of a device comprising a punch and two matrix plates, said punch being made in the form of a plate with projections and bulges thereon, entering the cutouts on the matrix plates, and a method for preparing the biological
    Type: Grant
    Filed: March 6, 1986
    Date of Patent: September 8, 1987
    Assignee: Moskovskoe Vysshee Tekhnicheskoe Uchilische, Imeni N.E. Baumana
    Inventors: Sergei L. Dzemeshkevich, Nikolai N. Zavalishin, Svetlana M. Krasovskaya, Valery M. Sagalevich, Boris A. Konstantinov, Alexandr K. Nenjukov, Alexei S. Ivanov
  • Hollow-cathode gas-discharge tube
    Patent number: 4320321
    Abstract: A hollow-cathode gas-discharge tube comprises an anode and a cathode contained within a suitable envelope and isolated from one another, the cathode being provided with a cylindrical cavity having a diameter d, which is open on the side of the anode. The anode represents a hollow body of revolution arranged coaxially with the cathode cavity and composed of a hollow cylindrical portion mating a hollow variable-section portion. One portion of the anode represents a hollow cylindrical structure having a cavity diameter D, its bottom being provided with a central opening and disposed level with or below the end surface of the cathode. The other portion of the anode contains a cavity whose diameter evenly increases in the direction of emission from the cavity diameter D of the cylindrical portion of the anode, a height 1 of the cylindrical portion of the anode, its cavity diameter D, and the diameter d of the cylindrical cavity of the cathode being related to one another as follows:3d.ltoreq.1.ltoreq.6d2.ltoreq.
    Type: Grant
    Filed: March 25, 1980
    Date of Patent: March 16, 1982
    Inventors: Vitaly V. Alexandrov, Anatoly I. Bezlepkin, Boris A. Konstantinov, Olga V. Melnikova, Anatoly S. Khomyak, Lev I. Schukin, Marat S. Chukin