Patents by Inventor Ludmila Levin

Ludmila Levin 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).

  • Magnetic polishing fluids
    Patent number: 6413441
    Abstract: Magnetic polishing fluid compositions comprising various size colloidal and/or non-colloidal magnetic particle and colloidal size polishing particle compositions suitable for polishing ceramic and glass substrates are described. The compositions are usually aqueous compositions having highly basic pHs. Methods for preparing the various polishing fluids compositions are also discussed.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: July 2, 2002
    Assignee: MPM Ltd.
    Inventor: Ludmila Levin
  • Magnetic polishing fluids for polishing metal substrates
    Patent number: 6402978
    Abstract: Magnetic polishing fluid compositions for polishing metal substrates containing colloidal and/or non-colloidal magnetic particles are described. The compositions contain oxidizers and, for example, oxidation inhibitors for assisting in the polishing process. Colloidal polishing particles may also be employed. The compositions are usually highly acidic. Methods for preparing the various polishing fluids compositions are described.
    Type: Grant
    Filed: May 4, 2000
    Date of Patent: June 11, 2002
    Assignee: MPM Ltd.
    Inventor: Ludmila Levin