Patents by Inventor Yoshikazu Kumagai

Yoshikazu Kumagai 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).

  • Crystalline fumarate of 2-phenyl-1, 3-thiazolidine-4-on derivative
    Patent number: 6191281
    Abstract: Disclosed are crystals of a compound represented by the formula: and processes for preparing them.
    Type: Grant
    Filed: July 27, 1999
    Date of Patent: February 20, 2001
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Kazuya Nakagomi, Tatsuya Kato, Tomokazu Ozaki, Yoshikazu Kumagai
  • 4H-3,1-benzoxazine derivatives, process for producing the same and agricultural or horticultural fungicide containing the same
    Patent number: 4596801
    Abstract: Novel 4H-3,1-benzoxazine derivative of the formula: ##STR1## wherein X and Y each independently represent a halogen atom of a lower alkyl group; m and n each independently represent an integer of 0 to 2, and when m or n is 2, the plurality or each of X or Y may have the same or different meanings; R is a hydrogen atom, an alkyloxy group, an alkynyloxy group, an alkylthio group or an alkenylthio group, and a process for their production are provided. The compounds are highly effective against pathogenic fungi while being well tolerated by cultivated plants.
    Type: Grant
    Filed: March 13, 1984
    Date of Patent: June 24, 1986
    Assignee: Chugai Seiyaku Kabushiki Kaisha
    Inventors: Hiroshi Sugiyama, Keizo Hosoda, Yoshikazu Kumagai, Masaki Takeuchi, Masanori Okada