Patents by Inventor Ryutaro Kawai

Ryutaro Kawai 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).

  • MICROORGANISM THAT PRODUCES USEFUL SUBSTANCE AND METHOD FOR PRODUCING USEFUL SUBSTANCE
    Publication number: 20240117298
    Abstract: One or more embodiments of the present invention provide a microbial strain with improved productivity of ?-glutamylcysteine, bis-?-glutamylcystine, ?-glutamylcystine, reduced glutathione, and/or oxidized glutathione. Such microbial strain has disruption of [1] a gene encoding ?-glutamyltransferase and [2] a gene encoding phosphoglycerate mutase and enhanced expression of [3] a gene encoding glutamate-cysteine ligase and/or a gene encoding glutathione synthetase or [4] a gene encoding bifunctional glutathione synthetase. This invention also discloses a method for producing the substances mentioned above via culture of the microbial strain.
    Type: Application
    Filed: December 16, 2021
    Publication date: April 11, 2024
    Applicant: KANEKA CORPORATION
    Inventors: Shingo KOBAYASHI, Naoaki TAOKA, Yoshihiro TOYA, Hiroshi SHIMIZU, Ryutaro KAWAI
  • Labelling circuit and processor for image processing
    Patent number: 5305393
    Abstract: A temporarily labelled image data generating circuit is composed of an initial label memory, which stores the initial temporary label values of pixels that are connected within the line being scanned, and a run length counter, which counts the number of pixels of the connected pixels, and finally labelled image data is generated following the generation of temporarily labelled image data and temporary label table data, which indicate the conversion relation for the modification of the temporary labels, using the initial label memory and run length counter, which improves the processing speed by reducing the number of times the memory is accessed and reduces the storage capacity of the working memory.
    Type: Grant
    Filed: December 26, 1991
    Date of Patent: April 19, 1994
    Assignee: Kawasaki Steel Corporation
    Inventors: Ryutaro Kawai, Toshimi Kobayashi
  • Sodium .beta.-[2,6-dimethyl-3,5-bis(ethoxycarbonyl)-4-(3-nitrophenyl)-1,4-dihyd ropyridine-1-yl]ethyl sulfate
    Patent number: 4021434
    Abstract: Novel 1-substituted-1, 4-dihydropyridine derivatives, particularly diethyl 1-ethoxymethyl-4-(3-nitrophenyl)-2, 6-dimethyl-1, 4-dihydropyridine-3,5-dicarboxylate are provided. The novel derivatives have cerebral vascular dilator activity with low toxicity.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: May 3, 1977
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Kozo Takahashi, Teruaki Ozasa, Kazuharu Tamazawa, Ryutaro Kawai, Toichi Takenaka, Norio Sato
  • N-alkenyltetracycline derivatives
    Patent number: 3991111
    Abstract: N-alkenyltetracycline derivatives, for example, N-(1-methyl-2-.alpha.-naphthylethenyl)tetracycline represented by the formula ##SPC1##The compounds have excellent antibacterial action as compared with tetracycline.
    Type: Grant
    Filed: May 6, 1975
    Date of Patent: November 9, 1976
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Masaru Iwanami, Tadao Shibanuma, Masaharu Fujimoto, Norio Sato, Ryutaro Kawai, Kuniichiro Yano
  • 1,4-Dihydropyridine derivatives
    Patent number: 3985758
    Abstract: There are provided novel 1,4-dihydropyridine derivatives, particularly 2,6-dimethyl-4-(3'-nitrophenyl)-1,4-dihydropyridine-3,5-dicarboxylic acid 3-.beta.-(N-benzyl-N-methylamino)ethyl ester and 5-methyl ester. The 1,4-dihydropyridine derivatives are characterized by cerebral vascular dilator activity.
    Type: Grant
    Filed: June 6, 1975
    Date of Patent: October 12, 1976
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Kozo Takahashi, Masaru Iwanami, Masaharu Fujimoto, Tadao Shibanuma, Ryutaro Kawai, Toichi Takenaka
  • Novel N-alkenyltetracycline derivatives
    Patent number: 3951962
    Abstract: N-alkenyltetracycline derivatives, for example, N-[1-methyl-2(2-thienyl)-1-butenyl]tetracycline represented by the formula ##SPC1##The compounds have excellent antibacterial action as compared with tetracycline.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: April 20, 1976
    Assignee: Yamanouchi Pharmaceutical Co., Ltd.
    Inventors: Masuo Murakami, Masaru Iwanami, Tadao Shibanuma, Masaharu Fujimoto, Norio Sato, Ryutaro Kawai, Kuniichiro Yano