Patents by Inventor Mikhail G. Efros

Mikhail G. Efros 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).

  • Moulding composition to produce abrasive tooling
    Patent number: 4968327
    Abstract: The composition is formulated as follows, in percent by weight:synthetic corundum material: 76.5 to 90.0kaolinite: 2.1 to 5.7feldspar: 2.8 to 7.6adhesive and moistening ingredient: 3.0 to 4.5calcium borosilicate frit: 2.1 to 5.7Calcium borosilicate frit compositon, in percent by weight, is as follows:silicon oxide: 22.0 to 38.0aluminium oxide: 14.5 to 15.5boron oxide: 25.0 to 35.0calcium oxide: 12.5 to 17.5sodium oxide: 4.0 to 7.5potassium oxide: 2.0 to 3.5The boron oxide-to-calcium oxide ratio is within 1.5 to 2.5.
    Type: Grant
    Filed: April 6, 1989
    Date of Patent: November 6, 1990
    Assignee: Nauchno-Proizvodstvennoe Obiedinenie Po Abrazivam
    Inventors: Mikhail G. Efros, Zoya M. Prozorova, Svetlana M. Fedotova, Vadim S. Burov, Vyacheslav M. Kolomazin, Grigory I. Lemesh
  • Abrasive material
    Patent number: 4906255
    Abstract: A material containing corundum crystals from 5 to 350 microns in size and any one of the additions: spinel, anorthitic glass, cordieritic glass, or a mixture of spinel and either of said glasses. Said addition amounts to 1.5-7.5% by mass of the abrasive material and is spread between the corundum crystals in the form of interlayers less than 20 microns thick.
    Type: Grant
    Filed: January 10, 1989
    Date of Patent: March 6, 1990
    Inventors: Tatyana P. Nikitina, Jury M. Kovalchuk, Valentina V. Larionova, Alexandr N. Volokhonsky, Vladislav P. Lukanin, Mikhail G. Efros, Ivan P. Vasiliev, Ilya Z. Pevzner