Patents Assigned to Kaken Chemical Company, Limited
  • Streptovaricin C derivatives
    Patent number: 4212881
    Abstract: Streptovaricin C derivatives having the formula ##STR1## wherein R represents an allyl, cycloalkyl or adamanthyl group or a C.sub.1 -C.sub.20 alkyl group which can be substituted with hydroxyl, cyano, acetyl, formyl, furoyl, thenoyl, alkoxy, carbamyl, phenyl or substituted phenyl group or a phenacyl group which can be substituted with a halogen, alkoxy or phenyl group.
    Type: Grant
    Filed: January 16, 1979
    Date of Patent: July 15, 1980
    Assignee: Kaken Chemical Company, Limited
    Inventors: Kazuya Sasaki, Hiromi Mitsui, Kazukiyo Onodera
  • Method of producing salinomycin antibiotics
    Patent number: 4212942
    Abstract: Polyether type antibiotics are produced by culturing a polyether type antibiotic-producing microorganism in a medium containing a fatty acid or its precursor and ammonia or an ammonium salt or urea.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: July 15, 1980
    Assignee: Kaken Chemical Company, Limited
    Inventors: Yukio Miyazaki, Akira Shibata, Tateo Yahagi, Masayuki Hara, Kaoru Hara, Singo Yoneda, Hiroko Kasahara, Yuko Nakamura
  • Method of producing salinomycin antibiotics
    Patent number: RE34698
    Abstract: Polyether type antibiotics are produced by culturing a polyether type antibiotic-producing microorganism is a medium containing a fatty acid or its precursor and ammonia or an ammonium salt or urea.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 16, 1994
    Assignee: Kaken Chemical Company, Limited
    Inventors: Yukio Miyazaki, Akira Shibata, Tateo Yahagi, Masayuki Hara, Kaoru Hara, Singo Yoneda, Hiroko Kasahara, Yuko Nakamura