Patents by Inventor Mariko KUNAI

Mariko KUNAI 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).

  • Film roll, method of producing the same, and method of testing the same
    Patent number: 10689217
    Abstract: An inclination of an outer circumferential surface of a film roll with respect to a widthwise axis is restricted. The roll includes: an outer cylinder part having a material thickness that is smaller toward a negative side of a y-axis than it is toward a positive side of the y-axis; and a slit separator which is wound around an outer circumferential surface of the outer cylinder part and which has a thickness that is larger toward the negative side of the y-axis than it is toward the positive side of the y-axis.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: June 23, 2020
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventors: Mariko Kunai, Hiroko Nakashima, Daizaburo Yashiki
  • FILM ROLL, METHOD OF PRODUCING THE SAME, AND METHOD OF TESTING THE SAME
    Publication number: 20160362269
    Abstract: An inclination of an outer circumferential surface of a film roll with respect to a widthwise axis is restricted. The roll includes: an outer cylinder part having a material thickness that is smaller toward a negative side of a y-axis than it is toward a positive side of the y-axis; and a slit separator which is wound around an outer circumferential surface of the outer cylinder part and which has a thickness that is larger toward the negative side of the y-axis than it is toward the positive side of the y-axis.
    Type: Application
    Filed: June 9, 2016
    Publication date: December 15, 2016
    Inventors: Mariko KUNAI, Hiroko NAKASHIMA, Daizaburo YASHIKI