Patents by Inventor Youziro Yoshino

Youziro Yoshino 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).

  • Process for the preparation of Dl-.alpha.-tocopherol of high purity
    Patent number: 4217285
    Abstract: A process for preparing high purity dl-.alpha.-tocopherol by condensing trimethylhydroquinone and a phytol in the presence of zinc chloride, a mineral acid and, either silica-alumina or silica gel, or a combination of silica-alumina and silica gel, is described.
    Type: Grant
    Filed: February 13, 1979
    Date of Patent: August 12, 1980
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Youziro Yoshino, Kazuko Kondo
  • Butenoic and pyruvic acid derivatives
    Patent number: 4096338
    Abstract: 2-Hydroxy-butenoic acid derivatives of the general formula: ##STR1## are described. These compounds have antiphlogistic activity.
    Type: Grant
    Filed: November 18, 1976
    Date of Patent: June 20, 1978
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Katsura Kogure, Noriyoshi Sueda, Sizuo Himoto, Youziro Yoshino, Kunio Nakagawa
  • Process for preparing a 2-methyl-(substituted aryl)-pyruvic acid compound
    Patent number: 4042617
    Abstract: A process for preparing 3-methyl-3-(substituted aryl)-pyruvic acid compounds by treating a glycidic acid ester compound of the formula, ##STR1## wherein R.sup.1 is a 4-biphenylyl, 4-clyclohexylphenyl, 3-phenoxyphenyl, 4'-fluoro-4-biphenylyl, 2-fluoro-4-biphenylyl or 3-benzoylphenyl group and R.sup.2 is a lower alkyl group or its corresponding free acid with a Lewis acid to form a 2-hydroxy-3-(substituted aryl)-3-butenoic acid ester and treating the resulting ester in an alcohol with an alkali metal alcoholate to form the pyruvic acid compounds. If desired, the pyruvic acid compounds can then be saponified to compounds of the formula, ##STR2## wherein R.sup.1 is as previously defined and which compounds are useful as anti-inflammatory agents.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: August 16, 1977
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Katsura Kogure, Noriyoshi Sueda, Sizuo Himoto, Youziro Yoshino, Kunio Nakagawa
  • Butenoic and pyruvic acid derivatives
    Patent number: 4016196
    Abstract: Process for preparing a 2-hydroxy-butenoic acid derivative of the general formula, ##STR1## wherein R.sup.1 is a group selected from aliphatic, alicyclic or aromatic radicals and R.sup.2 is a lower alkyl group by heating a glycidic acid derivative having the general formula, ##STR2## wherein R.sup.1 and R.sup.2 is as defined above or for preparing a pyruvic acid derivative of the general formula, ##STR3## wherein R.sup.1 and R.sup.2 are as defined above by heating the glycidic acid derivative of the above mentioned formula (I) or the 2-hydroxy-butenoic acid derivative of formula (II) in the presence of an electrophilic agent.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: April 5, 1977
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Katsura Kogure, Noriyoshi Sueda, Sizuo Himoto, Youziro Yoshino, Kunio Nakagawa
  • Process for producing 2-hydroxy-3-butenoic acid derivatives
    Patent number: 4007217
    Abstract: Process for producing a 2-hydroxy-3-butenoic acid derivative having the formula ##STR1## wherein R.sup.1 is an aliphatic, alicyclic or aromatic group and R.sup.2 is a lower alkyl group by treating a glycidic acid ester derivative having the formula ##STR2## wherein R.sup.1 and R.sup.2 are as defined above in the presence of an acid.
    Type: Grant
    Filed: July 28, 1975
    Date of Patent: February 8, 1977
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Katsura Kogure, Noriyoshi Sueda, Sizuo Himoto, Youziro Yoshino, Kunio Nakagawa