Patents by Inventor Akitoshi OOTA

Akitoshi OOTA 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).

  • Diamondlike carbon hard multilayer film formed body and method for producing the same
    Patent number: 8808858
    Abstract: A diamondlike carbon hard multilayer formed film body comprises a substrate, a diamondlike carbon film mainly composed of diamondlike carbon, and an intermediate layer between the substrate and the diamondlike carbon film. The diamondlike carbon film is composed of, in order from the substrate side, a first diamondlike carbon film and a second diamondlike carbon film. The surface hardness of the first diamondlike carbon film is within the range from not less than 10 GPa to not more than 40 GPa based on nanoindentation test, and the surface hardness of the second diamondlike carbon film is within the range from more than 40 GPa to not more than 90 GPa based on nanoindentation test.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: August 19, 2014
    Assignee: Kobe Steel, Ltd.
    Inventors: Koichiro Akari, Akitoshi Oota
  • DIAMONDLIKE CARBON HARD MULTILAYER FILM FORMED BODY AND METHOD FOR PRODUCING THE SAME
    Publication number: 20090250338
    Abstract: A diamondlike carbon hard multilayer formed film body comprises a substrate, a diamondlike carbon film mainly composed of diamondlike carbon, and an intermediate layer between the substrate and the diamondlike carbon film. The diamondlike carbon film is composed of, in order from the substrate side, a first diamondlike carbon film and a second diamondlike carbon film. The surface hardness of the first diamondlike carbon film is within the range from not less than 10 GPa to not more than 40 GPa based on nanoindentation test, and the surface hardness of the second diamondlike carbon film is within the range from more than 40 GPa to not more than 90 GPa based on nanoindentation test.
    Type: Application
    Filed: June 15, 2009
    Publication date: October 8, 2009
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Koichiro AKARI, Akitoshi OOTA
  • DIAMONDLIKE CARBON HARD MULTILAYER FILM FORMED BODY AND METHOD FOR PRODUCING THE SAME
    Publication number: 20070054125
    Abstract: A diamondlike carbon hard multilayer formed film body comprises a substrate, a diamondlike carbon film mainly composed of diamondlike carbon, and an intermediate layer between the substrate and the diamondlike carbon film. The diamondlike carbon film is composed of, in order from the substrate side, a first diamondlike carbon film and a second diamondlike carbon film. The surface hardness of the first diamondlike carbon film is within the range from not less than 10 GPa to not more than 40 GPa based on nanoindentation test, and the surface hardness of the second diamondlike carbon film is within the range from more than 40 GPa to not more than 90 GPa based on nanoindentation test.
    Type: Application
    Filed: August 28, 2006
    Publication date: March 8, 2007
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Koichiro AKARI, Akitoshi Oota