Patents by Inventor Hayato Ishikawa

Hayato Ishikawa 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: 11142497
    Abstract: An object of the present invention is to provide a novel plant growth inhibiting agent and a plant growth inhibiting method using the same. The plant growth inhibiting agent of the present invention comprises, as an active ingredient, a compound represented by the following formula (I?) and/or a salt thereof. In the formula (I?), R1a represents a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C14 aryl group, a substituted or unsubstituted C3 to C13 heteroaryl group, or the like; R2 represents a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C6 to C14 arylene group, or the like; R3a represents OH, a substituted or unsubstituted C1 to C6 alkoxy group, or the like; X represents an oxygen atom; Y represents a substituent; q represents any integer of 0 to 3; n represents 0 or 1; and m represents 0 or 1.
    Type: Grant
    Filed: February 6, 2018
    Date of Patent: October 12, 2021
    Assignees: National University Corporation Kumamoto University, Nippon Soda Co., Ltd.
    Inventors: Hayato Ishikawa, Tokio Tani, Shinichiro Sawa, Takashi Ishida, Yusuke Fukushima, Jun Inagaki
  • Publication number: 20210312397
    Abstract: Message display control means updates and displays messages sequentially on a message list screen each time message receiving means receives a message. When input detection means detects a response message, identification means identifies the latest message at the time of detection and the response message. Response message sending means sends the response message as a response to the identified message to other participants upon completion of input of the response message. Therefore, even in the case where the message list screen is updated due to receiving the subsequent message during the input of the response message, the completed response message is able to be sent back to the response object message.
    Type: Application
    Filed: June 17, 2021
    Publication date: October 7, 2021
    Inventors: Nobuyuki Ishikawa, Kazuhiro Konno, Akira Saitoh, Shigeki Takeuchi, Hayato Uenohara
  • Publication number: 20210276950
    Abstract: An object of the present invention is to provide a novel plant growth inhibiting agent and a plant growth inhibiting method using the same. The plant growth inhibiting agent of the present invention comprises, as an active ingredient, a compound represented by the following formula (I?) and/or a salt thereof. In the formula (I?), R1a represents a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C6 to C14 aryl group, a substituted or unsubstituted C3 to C13 heteroaryl group, or the like; R2 represents a substituted or unsubstituted C1 to C20 alkylene group, a substituted or unsubstituted C6 to C14 arylene group, or the like; R3a represents OH, a substituted or unsubstituted C1 to C6 alkoxy group, or the like; X represents an oxygen atom; Y represents a substituent; q represents any integer of 0 to 3; n represents 0 or 1; and m represents 0 or 1.
    Type: Application
    Filed: February 6, 2018
    Publication date: September 9, 2021
    Applicants: NATIONAL UNIVERSITY CORPORATION KUMAMOTO UNIVERSITY, Nippon Soda Co., Ltd.
    Inventors: Hayato ISHIKAWA, Tokio TANI, Shinichiro SAWA, Takashi ISHIDA, Yusuke FUKUSHIMA, Jun INAGAKI
  • Patent number: 9139514
    Abstract: Disclosed are a process suited to large scale synthesis with high yield for producing oseltamivir phosphate, in which a preparation of oseltamivir phosphate which is highly safe as a pharmaceutical product can be produced, and an intermediate compound for producing oseltamivir phosphate. In this production process, an intermediate compound represented by general formula (V) is synthesized by employing Michael reaction/Michael reaction/Horner-Wadsworth-Emmons reaction, and oseltamivir phosphate is produced by converting the substituent groups in this intermediate compound.
    Type: Grant
    Filed: July 2, 2013
    Date of Patent: September 22, 2015
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Yujiro Hayashi, Hayato Ishikawa
  • Publication number: 20130296600
    Abstract: Disclosed are a process suited to large scale synthesis with high yield for producing oseltamivir phosphate, in which a preparation of oseltamivir phosphate which is highly safe as a pharmaceutical product can be produced, and an intermediate compound for producing oseltamivir phosphate. In this production process, an intermediate compound represented by general formula (V) is synthesized by employing Michael reaction/Michael reaction/Horner-Wadsworth-Emmons reaction, and oseltamivir phosphate is produced by converting the substituent groups in this intermediate compound.
    Type: Application
    Filed: July 2, 2013
    Publication date: November 7, 2013
    Inventors: Yujiro Hayashi, Hayato Ishikawa
  • Patent number: 8501980
    Abstract: Disclosed are a process suited to large scale synthesis with high yield for producing oseltamivir phosphate, in which a preparation of oseltamivir phosphate which is highly safe as a pharmaceutical product can be produced, and an intermediate compound for producing oseltamivir phosphate. In this production process, an intermediate compound represented by general formula (V) is synthesized by employing Michael reaction/Michael reaction/Horner-Wadsworth-Emmons reaction, and oseltamivir phosphate is produced by converting the substituent groups in this intermediate compound.
    Type: Grant
    Filed: May 28, 2009
    Date of Patent: August 6, 2013
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Yujiro Hayashi, Hayato Ishikawa
  • Publication number: 20110082302
    Abstract: Disclosed are a process suited to large scale synthesis with high yield for producing oseltamivir phosphate, in which a preparation of oseltamivir phosphate which is highly safe as a pharmaceutical product can be produced, and an intermediate compound for producing oseltamivir phosphate. In this production process, an intermediate compound represented by general formula (V) is synthesized by employing Michael reaction/Michael reaction/Horner-Wadsworth-Emmons reaction, and oseltamivir phosphate is produced by converting the substituent groups in this intermediate compound.
    Type: Application
    Filed: May 28, 2009
    Publication date: April 7, 2011
    Inventors: Yujiro Hayashi, Hayato Ishikawa