Patents by Inventor Yasuo Homma

Yasuo Homma 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).

  • Plant disease preventing agents
    Patent number: 5248694
    Abstract: A plant disease preventing agent which comprises as an effective ingredient at least one compound represented by the following formula (I) and a carrier: ##STR1## wherein R is selected from group consisting of 4-hydroxy-3-oxopent-1Z-enyl, 4 hydroxy-3-oxopent-1E-enyl, 3,4-dihydroxypent-1E-enyl and 1,4-dihydroxy-3-oxopentyl groups.The agent is effective to prevent melanose spot disease of oranges, stem-end rot disease, grey mold of petunia petals and rice blight.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: September 28, 1993
    Assignee: Rikagaku Kenkyusho
    Inventors: Yasuo Homma, Yasuo Fujimoto
  • Coated agricultural chemicals
    Patent number: 5123950
    Abstract: A coated agricultural chemical comprises a powdery effective component of an agricultural chemical coated with at least one member selected from the group consisting of esters of aliphatic acids and aliphatic polyols and phospholipids in an amount of 0.1 to 3 parts by weight per 100 parts by weight of the effective component. The agricultural chemicals exhibit high efficiency even at a concentration lower than that conventionally used and low phytotoxicity to plants.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: June 23, 1992
    Assignee: Rikagaku Kenkyusho
    Inventors: Yasuo Homma, Yutaka Arimoto
  • Agricultural and horticultural fungicide and fruit storage disease preventing agent and process for production thereof
    Patent number: 4599233
    Abstract: It was found that sodium bicarbonate has a fungicidal activity and at the same time that the compound has a defect as a fungicide in that it is inferior in adhesiveness and spreadability and for this reason cannot be used alone as a fungicide. It is further found that an agricultural and horticultural fungicide having lasting fungicidal activity against plant diseases in a control value of over 90% can be obtained by using sodium bicarbonate in combination with a surfactant, particularly a food emulsifier, and further that the combination shows extensive effect in preventing fruit storage diseases. As all components of the combination are substances approved as food additives throughout the world, the fungicide does not cause pollution or present any hazard to human health.
    Type: Grant
    Filed: December 12, 1984
    Date of Patent: July 8, 1986
    Assignees: Rikagaku Kenkyusho, Riken Vitamin Oil Co., Ltd., Hodogaya Chemical Co., Ltd.
    Inventors: Tomomasa Misato, Yasuo Homma, Yutaka Arimoto, Tohoru Hidaka, Mitsuhara Yuda
  • 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
  • Fungicidal methods employing amino acid derivatives
    Patent number: 3947589
    Abstract: N-Higher aliphatic amino acids, lowe-alkyl esters thereof and their salts are useful for controlling numerous plant diseases. They exhibit excellent protective effect rather than curative effect and have no phytotoxicity, extremely low mammalian toxicity and cause no risk of pollution toward soils.
    Type: Grant
    Filed: May 9, 1974
    Date of Patent: March 30, 1976
    Assignees: Rikagaku Kenkyusho, Ajinomoto Co. Ltd.
    Inventors: Tomomasa Misato, Keng Tang Huang, Yasuo Homma, Seizo Kanao, Takeshi Toyoda, Tadashi Suyama, Toshiro Shida