Patents by Inventor Fumihiko Ohtani

Fumihiko Ohtani 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).

  • Method of polymerizing photo-polymerizable composition for dental use and dental light-curing apparatus for use therewith
    Patent number: 6168431
    Abstract: A method of polymerizing a photo-polymerizable dental composition with the use of a light-curing apparatus including a light source (1) for emitting a laser beam and an optical fiber (2) optically coupled with the light source (1) and having a light emitting element (5) opposite to the light source (1). The photo-polymerizable dental composition (M) is filled in a dental cavity (H), and the light emitting element (5) of the optical fiber (2) is subsequently introduced in the filled photo-polymerizable dental composition (M) to a position adjacent a bottom of the dental cavity (H). Thereafter, the filled photo-polymerizable dental composition (M) is irradiated with the laser beam of 350 to 500 mm in wavelength at 10 to 100 mW, to cause the filled photo-polymerizable dental composite (M) to initiate polymerization progressively from a portion thereof adjacent the bottom of the dental cavity (H) towards a surface portion thereof.
    Type: Grant
    Filed: September 22, 1999
    Date of Patent: January 2, 2001
    Assignees: Kuraray Co., Ltd., Shimadzu Corporation
    Inventors: Hideaki Narusawa, Kenichi Hino, Fumihiko Ohtani, Masahiro Ihara
  • Method of polymerizing photo-polymerizable composition for dental use and dental light-curing apparatus for use therewith
    Patent number: 6033223
    Abstract: A method of polymerizing a photo-polymerizable dental composition with the use of a light-curing apparatus including a light source (1) for emitting a laser beam and an optical fiber (2) optically coupled with the light source (1) and having a light emitting element (5) opposite to the light source (1). The photo-polymerizable dental composition (M) is filled in a dental cavity (H), and the light emitting element (5) of the optical fiber (2) is subsequently introduced in the filled photo-polymerizable dental composition (M) to a position adjacent a bottom of the dental cavity (H). Thereafter, the filled photo-polymerizable dental composition (M) is irradiated with the laser beam of 350 to 500 nm in wavelength at 10 to 100 mW, to cause the filled photo-polymerizable dental composite (M) to initiate polymerization progressively from a portion thereof adjacent the bottom of the dental cavity (H) towards a surface portion thereof.
    Type: Grant
    Filed: September 18, 1997
    Date of Patent: March 7, 2000
    Assignees: Kuraray Co., Ltd., Shimadzu Corporation
    Inventors: Hideaki Narusawa, Kenichi Hino, Fumihiko Ohtani, Masahiro Ihara