Patents by Inventor Spiro Megremis

Spiro Megremis 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).

  • Methods for testing the polishability of materials
    Patent number: 8657645
    Abstract: A method and apparatus for measuring the polishability of a solid material such as a dental restorative material includes using a series of apparatus to perform the steps of forming the material into a desired specimen with a generally planar surface, conditioning the surface by abrasion, measuring the abraded surface with a profile determination device, optionally measuring the amount of material abraded from the surface and the gloss of the abraded surface, polishing a portion of the abraded surface with a polishing device at a controlled load for a pre-determined time and measuring the roughness and/or gloss of the polished surface followed by comparison thereof to the corresponding measurements of the unpolished, conditioned portion of the specimen surface. Polishing materials and devices may also be tested using the apparatus and method for polishing a standardized material.
    Type: Grant
    Filed: March 4, 2013
    Date of Patent: February 25, 2014
    Assignee: American Dental Association
    Inventors: Nikola Njegovan, Spiro Megremis, Olga Sirovskaya, Hank Shepelak
  • Apparatus for testing the polishability of materials
    Patent number: 8398454
    Abstract: A method and apparatus for measuring the polishability of a solid material such as a dental restorative material includes using a series of apparatus to perform the steps of forming the material into a desired specimen with a generally planar surface, conditioning the surface by abrasion, measuring the abraded surface with a profile determination device, optionally measuring the amount of material abraded from the surface and the gloss of the abraded surface, polishing a portion of the abraded surface with a polishing device at a controlled load for a pre-determined time and measuring the roughness and/or gloss of the polished surface followed by comparison thereof to the corresponding measurements of the unpolished, conditioned portion of the specimen surface. Polishing materials and devices may also be tested using the apparatus and method for polishing a standardized material.
    Type: Grant
    Filed: September 30, 2009
    Date of Patent: March 19, 2013
    Assignee: American Dental Association
    Inventors: Nikola Njegovan, Spiro Megremis, Olga Sirovskaya, Hank Shepelak
  • APPARATUS AND METHODS FOR TESTING THE POLISHABILITY OF MATERIALS
    Publication number: 20100081362
    Abstract: A method and apparatus for measuring the polishability of a solid material such as a dental restorative material includes using a series of apparatus to perform the steps of forming the material into a desired specimen with a generally planar surface, conditioning the surface by abrasion, measuring the abraded surface with a profile determination device, optionally measuring the amount of material abraded from the surface and the gloss of the abraded surface, polishing a portion of the abraded surface with a polishing device at a controlled load for a pre-determined time and measuring the roughness and/or gloss of the polished surface followed by comparison thereof to the corresponding measurements of the unpolished, conditioned portion of the specimen surface. Polishing materials and devices may also be tested using the apparatus and method for polishing a standardized material.
    Type: Application
    Filed: September 30, 2009
    Publication date: April 1, 2010
    Applicant: American Dental Association Foundation
    Inventors: Nikola Njegovan, Spiro Megremis, Olga Sirovskaya, Hank Shepelak