Patents by Inventor Yukio Sumita

Yukio Sumita 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).

  • Diamond sinter, high-pressure phase boron nitride sinter, and processes for producing those sinters
    Patent number: 5536485
    Abstract: A powder of diamond or high-pressure phase boron nitride core particles charged into a coating space as it is dispersed, and a precursor of a coat forming substance allowed to contact and/or impinge against the particles in the powder of core particles so that their surfaces are covered with the coat forming substance, thereby preparing coated diamond or high-pressure phase boron nitride particles which are subsequently sintered. The thusly produced diamond of high-pressure phase boron nitride sinter is composed of coated core particles of high performance that are superhard, uniform, dense and sintered firmly, and which have a controlled microstructure.
    Type: Grant
    Filed: August 11, 1994
    Date of Patent: July 16, 1996
    Assignees: Agency of Industrial Science & Technology, Nisshin Flour Milling Co., Ltd., Reed Co., Ltd
    Inventors: Shoichi Kume, Haruo Yoshida, Yukiyoshi Yamada, Tadashi Fuyuki, Satoshi Akiyama, Yoshiaki Hamada, Eisuke Kuroda, Tadakatsu Nabeya, Yukio Sumita, Kenichi Kimura
  • Stable oral preparation of macrolide antibiotics and method for stabilizing the same
    Patent number: 4716153
    Abstract: Stable oral preparations of 16-membered ring macrolide antibiotics such as SF-837, josamycin, 3"-propionyljosamycin, by incorporating stabilizers showing pH 3-10 in an aqueous medium, such as glycine, and dissolution accelerators showing pH 2.5-4 in an aqueous medium such as citric acid or tartaric acid. Coating such dissolution accelerators with a film-forming substance is useful to enhance the stability of the oral preparation of such antibiotics.
    Type: Grant
    Filed: August 25, 1986
    Date of Patent: December 29, 1987
    Assignee: Toyo Jozo Company, Ltd.
    Inventors: Masataka Morishita, Masaru Ono, Yukio Sumita