Patents by Inventor Boris Davidovich

Boris Davidovich 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: 6050817
    Abstract: A dental model die ejector tool is designed to loosen the individual model dies mounted on a model base with a tapered dowel pin extending through the base, but at the same time not to lift them for any substantial distance. In turn, that loosening step allows for further easy separation of all the model dies with a wax cast as a single unit from the model base for further individual removal of the model dies. At one end, the model die ejector contains a pushing rod equipped with an ejector shank having a length of less than 1 mm and preferably about 0.1 mm for pushing the dowel pin upwardly in the corresponding sleeve for a short distance equal to the length of the shank so that the wax cast is not disturbed but the dowel pin is loosened. On the other end, the die ejector contains another pushing rod with an ejector cavity for loosening another commonly used type of a dowel pin extending from its sleeve after the removal of a protective cap.
    Type: Grant
    Filed: July 26, 1999
    Date of Patent: April 18, 2000
    Assignee: S. Lekhovitser
    Inventor: Boris Davidovich