Patents by Inventor Alvin Kobashigawa

Alvin Kobashigawa 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).

  • Optically Stable Transparent Zinc Oxide for Dental Applications
    Publication number: 20240158253
    Abstract: A method of stabilizing nanoparticle zinc oxide and the incorporation of nanopoarticle zinc oxide into a wide range of dental compositions. The use of nanoparticle zinc oxide allows for greater concentrations of zinc oxide to be incorporated into dental compositions while maintaining translucency and increased antimicrobial activity compared to equivalent concentrations of bulk zinc oxide.
    Type: Application
    Filed: November 11, 2022
    Publication date: May 16, 2024
    Applicant: Den-Mat Holdings, LLC
    Inventors: Alvin Kobashigawa, Daehwan Shin
  • Caries-resistant composite resin
    Patent number: 11141355
    Abstract: A direct filling composite resin restorative featuring a CTE that is similar to dentin and an antimicrobial is disclosed. The exemplary anti-microbial compound is zinc oxide. The CTE of the direct filling composite resin restorative is in the range of 12-15 ppm/° C. The low CTE is achieved by high filler loading of a trimodal distribution of low CTE filler. By maintaining a CTE substantially similar to that of dentin, the “Marginal Percolation” phenomenon is minimized, which decreases the incidence of secondary caries.
    Type: Grant
    Filed: September 13, 2019
    Date of Patent: October 12, 2021
    Assignee: Den-Mat Holdings, LLC
    Inventors: Jeff MacDonald, Alvin Kobashigawa
  • Caries-Resistant Composite Resin
    Publication number: 20200009020
    Abstract: A direct filling composite resin restorative featuring a CTE that is similar to dentin and an antimicrobial is disclosed. The exemplary anti-microbial compound is zinc oxide. The CTE of the direct filling composite resin restorative is in the range of 12-15 ppm/° C. The low CTE is achieved by high filler loading of a trimodal distribution of low CTE filler. By maintaining a CTE substantially similar to that of dentin, the “Marginal Percolation” phenomenon is minimized, which decreases the incidence of secondary caries.
    Type: Application
    Filed: September 13, 2019
    Publication date: January 9, 2020
    Inventors: Jeff MacDonald, Alvin Kobashigawa
  • CARIES-RESISTANT COMPOSITE RESIN
    Publication number: 20170348208
    Abstract: A single and dual component dental composite restorative featuring anti-microbial and low Coefficient of Thermal Expansion (CTE) compounds is disclosed. The exemplary anti-microbial compound is zinc oxide. The CTE of the dental composite restorative is the same as, or substantially similar, to that of dentin. By maintaining a CTE substantially similar to that of dentin, the Margin Percolation phenomenon is minimized, which decreases the incidence of secondary caries.
    Type: Application
    Filed: June 3, 2017
    Publication date: December 7, 2017
    Inventors: Jeff MacDonald, Alvin Kobashigawa