Patents by Inventor Yosio Hayasi

Yosio Hayasi 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).

  • Thiazole derivative and leukotriene antagonist containing the same as the effective ingredients
    Patent number: 4902700
    Abstract: Disclosed are a thiazole derivative represented by the following formula, a pharmaceutically acceptable salt thereof and leukotriene antagonist containing the same as the active ingredients: ##STR1## wherein R.sub.1 and R.sub.2 each independently represent a hydrogen atom, an alkyl group having 1 to 8 carbon atoms, a lower alkoxycarbonyl group or a substituted or unsubstituted phenyl group or cooperatively represent a tetramethylene group corresponding to a fused cyclohexane ring or a butadienylene group which is unsubstituted or substituted with a halogen atom, a lower alkoxy group, a lower alkoxycarbonyl group or an alkyl group having 1 to 3 carbon atoms corresponding to a fused benzene ring; R.sub.3, R.sub.4, R.sub.5 and R.sub.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: February 20, 1990
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Yosio Hayasi, Tomei Oguri, Masaki Shimoda, Mikio Tsutsui, Kazuo Takahashi, Hitoshi Miida
  • Prostacyclins and pharmaceuticals containing the same
    Patent number: 4839388
    Abstract: This invention relates to a novel prostacyclin represented by the formula: ##STR1## [wherein R.sup.1 represents --CO.sub.2 R.sup.5 group or --CONR.sup.6 R.sup.7 group; A is(i) --CH.dbd.CH--CH.sub.2 CH.sub.2 -- or(ii) --CH.sub.2 CH.sub.2 --O--CH.sub.2 --;B represents --C.tbd.C-- group; R.sup.2 represents an alkyl group, a cycloalkyl group, an alkenyl group, an alkynyl group, a phenyl group or a phenoxy group;R.sup.3 represents a hydrogen atom, a methyl group or a vinyl group; R.sup.4 represents a hydrogen atom, an acyl group, a tri(1 to 7 carbon atoms)hydrocarbyl-silyl group or a group forming an acetal bond with an oxygen atom of a hydroxy group; a double bond in the substituent represented by A is E or Z, or a mixture thereof; asymmetric center in the substituent represented by R.sup.
    Type: Grant
    Filed: May 18, 1987
    Date of Patent: June 13, 1989
    Assignees: Mitsubishi Chemical Industries Limited, Sagami Chemical Research Center
    Inventors: Masakatsu Sibasaki, Mikiko Sodeoka, Katsuhiko Iseki, Masaki Shinoda, Chiyoko Aoki, Yosio Hayasi, Toshiji Kanayama
  • 2H-Chromene-2-spiro-3'-phthalides useful as horticultural and agricultural fungicides
    Patent number: 4078074
    Abstract: The present invention provides a novel horticultural and agricultural fungicidal composition which contains as an effective component a 2H-chromene-2-spiro-3'-phthalide derivative and a method for killing fungus on plants.
    Type: Grant
    Filed: November 25, 1975
    Date of Patent: March 7, 1978
    Assignee: Rikagaku Kenkyusho and Mitsubishi Petrochemical Company Limited
    Inventors: Tomomasa Misato, Keido Ko, Yasuo Homma, Kazuhiko Konno, Yosio Hayasi, Tetsuo Sekiya, Kozo Sato
  • Wood preservatives and method for wood preservation treatment
    Patent number: 4075121
    Abstract: A wood preservative composition for control of wood decay by fungi, which comprises 2H-benzopyran-2-spiro-3'-phthalide or its derivatives such as 6-methyl-2H-benzopyran-2-spiro-3'-phthalide or benzo[f]-2H-benzopyran-2-spiro-3'-phthalide as an active ingredient. The active ingredient has extremely low mammalian toxicity, and exhibits an excellent wood-decay controlling effect.
    Type: Grant
    Filed: February 27, 1976
    Date of Patent: February 21, 1978
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Kazuhiko Konno, Yosio Hayasi, Eiji Taniyama, Tetsuo Sekiya