Patents by Inventor Yoshinobu Ko'Oka

Yoshinobu Ko'Oka 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).

  • Substituted-imidazolidinyl-3-chloro-3-cephem-4-carboxylic acid
    Patent number: 4473567
    Abstract: 7.beta.-[2-(substituted or unsubstituted)-5-oxo-4-phenylimidazolidin-1-yl]-3-chloro-3-cephem-4-carbox ylic acid represented by the formula: ##STR1## (wherein R is hydrogen or hydroxy;R.sup.1 and R.sup.2 each is hydrogen, alkyl, aralkyl or aryl, or when taken together, they represent alkylene optionally having a hetero atom in its skeleton; andR.sup.3 is hydrogen or an organic or inorganic base group to form a carboxylate salt group.
    Type: Grant
    Filed: April 13, 1982
    Date of Patent: September 25, 1984
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshinobu Ko'oka, Mariko Munekage, Hitoshi Minato
  • Substituted-imidazolidinyl-3-chloro-3-cephem-4-carboxylic acid
    Patent number: 4339575
    Abstract: 7.beta.-[2-(substituted or unsubstituted)-5-oxo-4-phenylimidazolidin-1-yl]-3-chloro-3-cephem-4-carbox ylic acid represented by the formula: ##STR1## (wherein R is hydrogen or hydroxy:R.sup.1 and R.sup.2 each is hydrogen, alkyl, aralkyl or aryl, or when taken together, they represent alkylene optionally having a hetero atom in its skeleton; andR.sup.3 is hydrogen or an organic or inorganic base group to form a carboxylate salt group.
    Type: Grant
    Filed: May 14, 1980
    Date of Patent: July 13, 1982
    Assignee: Shionogi & Co., Ltd.
    Inventors: Yoshinobu Ko'Oka, Mariko Munekage, Hitoshi Minato