Patents by Inventor Osamu Sakanaka

Osamu Sakanaka 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).

  • Patent number: 7250389
    Abstract: Disclosed are novel compounds useful for prevention or control of diseases derived from fungi, a process for producing the same, and novel antifungal agents using the novel compounds. The compounds useful for prevention and treatment of diseases derived from fungi according to the present invention include novel compounds represented by formula (I). The compounds represented by formula (I) have potent antifungal activity against diseases derived from fungi, and do not have phytotoxicity to mammals and agricultural and garden plants, from which diseases should be eliminated, and, even when applied to agricultural and garden plants, have high photostability.
    Type: Grant
    Filed: February 8, 1999
    Date of Patent: July 31, 2007
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Osamu Sakanaka, Koichi Mitomo, Takayoshi Tamura, Yasushi Murai, Katsuharu Iinuma, Takeshi Teraoka, Kikuko Kuzuhara, Haruki Mikoshiba, Makoto Taniguchi
  • Patent number: 7183278
    Abstract: Disclosed are novel compounds useful for the control of harmful organisms, harmful organism control agents using the same, and processes for producing the novel compounds. The useful novel compounds according to the present invention include compounds represented by formula (1).
    Type: Grant
    Filed: November 4, 1999
    Date of Patent: February 27, 2007
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Keiichi Imamura, Kouichi Mitomo, Natsuko Yamada, Kazumi Yamamoto, Takashi Teraoka, Osamu Sakanaka, Hiroshi Kurihara, Makoto Taniguchi
  • Patent number: 6329338
    Abstract: Novel derivatives of PF1022 substance, which are cyclodepsipeptides represented by the general formula (I) shown below or their salts are useful as anthelmintic agent for prevention or treatment of parasitic infections.
    Type: Grant
    Filed: May 20, 1998
    Date of Patent: December 11, 2001
    Assignees: Meiji Seika Kaisha, Ltd., Bayer Aktiengesellschaft
    Inventors: Osamu Sakanaka, Yumiko Okada, Makoto Ohyama, Maki Matsumoto, Masaaki Takahashi, Yasushi Murai, Katsuharu Iinuma, Achim Harder, Norbert Mencke, Gerhard Bonse, Peter Jeschke
  • Patent number: 6265537
    Abstract: The present invention relates to cyclic thiodepsipeptides, in particular 18 to 24-membered cyclothiodepsipeptides, their endoparasitical compositions, and methods of making and using the same.
    Type: Grant
    Filed: September 27, 1999
    Date of Patent: July 24, 2001
    Assignees: Bayer Aktiengesellschaft, Meiji Seika Kaisha, Ltd.
    Inventors: Peter Jeschke, Achim Harder, Georg von Samson-Himmelstjerna, Norbert Mencke, Gerhard Bonse, Katsuharu Iinuma, Osamu Sakanaka
  • Patent number: 6146853
    Abstract: Known cyclic depsipeptides which are PF 1022F substance and PF 1022H substance, as well as a novel cyclic depsipeptide, PF 1022G substance, are now prepared simultaneously by cultivating a fungal strain capable of producing PF 1022F substance, PF 1022G substance and PF 1022H substance represented by the known PF 1022 strain (deposited under FERM BP-2671) which is a kind of fungus belonging to asporous imperfect fungi (the order Agonomycetales) and is presumable to belong to the genus Xylaria or the genus Rosellinia in the family Xylariaceae.
    Type: Grant
    Filed: February 16, 2000
    Date of Patent: November 14, 2000
    Assignee: Meiji Seika Kaisha Ltd.
    Inventors: Makoto Ohyama, Masaaki Takahashi, Yoshiya Shigematsu, Osamu Sakanaka, Yashushi Murai, Katsuharau Iinuma
  • Patent number: 6043058
    Abstract: Known cyclic depsipeptides which are PE 1022F substance and PF 1022H substance, as well as a novel cyclic depsipeptide, PF 1022G substance, are now prepared simultaneously by cultivating a fungal strain capable of producing PF 1022F substance, PF 1022G substance and PF 1022H substance represented by the known PE 1022 strain (deposited under FERM BP-2671) which is a kind of fungus belonging to asporous imperfect fungi (the order Agonomycetales) and is presumable to belong to the genus Xylaria or the genus Rosellinia in the family Xylariaceae.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: March 28, 2000
    Assignee: Maiji Seika Kaisha Ltd.
    Inventors: Makoto Ohyama, Masaaki Takahashi, Yoshiya Shigematsu, Osamu Sakanaka, Yashushi Murai, Katsuharau Iinuma
  • Patent number: 5747448
    Abstract: Novel PF 1022 derivatives--cyclodepsipeptides represented by the below-described formula (I)--and acid addition salts thereof, which have been synthesized according to the present invention, have anthelmintic activities against various parasitic worms which are parasitic on human bodies, domestic animals and pet animals. They are therefore useful as anthelmintics for the prevention or treatment of parasitic infections. ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, Q, X, Y and Z have been defined herein.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: May 5, 1998
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Makoto Ohyama, Maki Ohishi, Yumiko Okada, Masao Koyama, Shinjiro Sumi, Yasushi Murai, Masayuki Takagi, Tadaaki Okada, Osamu Sakanaka, Toshio Yoneta, Katsuharu Iinuma, Seiji Shibahara
  • Patent number: 5596096
    Abstract: New compounds are disclosed having the general formulas (1) and (2): ##STR1## Also described is a process for preparing the compounds of formulas (1) and (2). Further described is a process for preparing a cephalosporin derivative having formula (5): ##STR2## by converting the compound of formula (1) to the compound of formula (2) and then converting the compound of formula (2) to the compound of formula (5).
    Type: Grant
    Filed: July 29, 1994
    Date of Patent: January 21, 1997
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Osamu Sakanaka, Shouhei Yasuda, Shinjiro Sumi, Katsufumi Sebata, Katsuharu Iinuma, Ken Nishihata
  • Patent number: 5405955
    Abstract: New compounds are disclosed having the general formulas (1) and (2): ##STR1## Also described is a process for preparing the compounds of formulas (1) and (2). Further described is a process for preparing a cephalosporin derivative having formula (5): ##STR2## by converting the compound of formula (1) to the compound of formula (2) and then converting the compound of formula (2) to the compound of formula (5).
    Type: Grant
    Filed: June 14, 1993
    Date of Patent: April 11, 1995
    Assignee: Meiji Seika Kaisha, Ltd.
    Inventors: Osamu Sakanaka, Shouhei Yasuda, Shinjiro Sumi, Katsufumi Sebata, Katsuharu Iinuma, Ken Nishihata