Patents Assigned to Marvic Ltd.
  • Method for non-destructive testing of materials and wares
    Patent number: 6087179
    Abstract: A non-destructive testing method for revealing surface and through defects in materials and articles. The method comprises filling up defects with a volatile penetrant, applying indicator material to a surface to be tested, removing the indicator material from the surface and registrating defects according to the presence color spots, shapes and dimensions which are functions of shapes and dimensions of real defects. The indicator material comprises a gas-permeable base with applied sulfonephthalein indicator in the range of 10.sup.-4 to 10.sup.-3 grams per 1 cubic centimeter of the base.
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: July 11, 2000
    Assignees: Marvic Ltd., Marotta Scientific Controls, Inc.
    Inventors: Nadejda G. Beriozkina, Ilia O. Leipunsky, Victor J. Maklashevsky
  • Compositions for use in methods for non-destructive testing of materials and wares
    Patent number: 5795712
    Abstract: A non-destructive testing method for revealing surface and through defects in materials and articles. The method comprises filling up defects with a volatile penetrant, applying indicator material to a surface to be tested, removing the indicator material from the surface and registrating defects according to the presence color spots, shapes and dimensions which are functions of shapes and dimensions of real defects. The indicator material comprises a gas-permeable base with applied sulfonephthalein indicator in the range of 10.sup.-4 to 10.sup.-3 grams per 1 cubic centimeter of the base.
    Type: Grant
    Filed: November 20, 1996
    Date of Patent: August 18, 1998
    Assignees: Marvic Ltd., Marotta Scientific Controls, Inc.
    Inventors: Nadejda G. Beriozkina, Ilia O. Leipunsky, Victor J. Maklashevsky