Patents by Inventor Toshihiro Hamakawa

Toshihiro Hamakawa 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).

  • Sulfonic acid ester derivatives and process for preparing same
    Patent number: 4797502
    Abstract: A sulfonic acid ester derivative represented by the general formula ##STR1## wherein R.sub.1 is a hydrogen atom, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, A is a group represented by the general formula ##STR2## (wherein R.sub.2 and R.sub.3 are each alkyl having 1 to 4 carbon atoms) or by the general formula ##STR3## (wherein R.sub.4 and R.sub.5 are each alkyl having 1 to 4 carbon atoms or, when taken together with the carbon atom to which they are attached, form cycloalkyl having 4 to 6 carbon atoms), and l is an integer of from 1 to 3, and a process for preparing the derivative.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: January 10, 1989
    Assignee: Taiho Pharmaceutical Company Limited
    Inventors: Setsuro Fujii, Kazuo Ogawa, Toshihiro Hamakawa, Yoshiyuki Muranaka
  • Sulfonic acid ester derivatives useful as antilipemic agents
    Patent number: 4675428
    Abstract: A sulfonic acid ester derivative represented by the general formula ##STR1## wherein R.sub.1 is a hydrogen atom, alkyl having 1 to 4 carbon atoms or alkoxy having 1 to 4 carbon atoms, A is a group represented by the general formula ##STR2## (wherein R.sub.2 and R.sub.3 are each alkyl having 1 to 4 carbon atoms) or by the general formula ##STR3## (wherein R.sub.4 and R.sub.5 are each alkyl having 1 to 4 carbon atoms or, when taken together with the cabon atom to which they are attached, form cycloalkyl having 4 to 6 carbon atoms), and l is an integer of from 1 to 3, and a process for preparing the derivative.
    Type: Grant
    Filed: May 7, 1986
    Date of Patent: June 23, 1987
    Assignee: Taiho Pharmaceutical Company, Limited
    Inventors: Setsuro Fujii, Kazuo Ogawa, Toshihiro Hamakawa, Yoshiyuki Muranaka
  • Antilipemic and anti-inflammatory compositions containing sulfonate derivatives
    Patent number: 4489091
    Abstract: Novel sulfonate derivatives represented by the formulaR.sub.1 SO.sub.3 CH.sub.2 CO(CH.sub.2).sub.n R.sub.2act to inhibit esterases and chymotripsin and are useful as antilipemic agents, anti-inflammatory agents, immunity controlling agents, etc.
    Type: Grant
    Filed: May 9, 1983
    Date of Patent: December 18, 1984
    Assignee: Taiho Pharmaceutical Company Limited
    Inventors: Setsuro Fujii, Toshihiro Hamakawa, Kazuo Ogawa, Yoshiyuki Muranaka, Sadao Hashimoto
  • Sulfonate derivatives, process for preparing same and antilipemic compositions containing the derivative
    Patent number: 4452813
    Abstract: A sulfonate derivative represented by the formula ##STR1## wherein R.sub.1 is lower alkyl, lower alkoxy or halogen, l is an integer of from 0 to 3, n is 0 or 1, A is straight-chain or branched-chain alkylene having 1 to 4 carbon atoms, and R.sub.2 is hydrogen or lower alkyl but, when n is 0 or 1 and A is straight-chain alkylene with 1 to 4 carbon atoms, is not hydrogen and the method for preparing the same.
    Type: Grant
    Filed: May 11, 1982
    Date of Patent: June 5, 1984
    Assignee: Taiho Pharmaceutical Company Limited
    Inventors: Setsuro Fujii, Toshihiro Hamakawa, Kazuo Ogawa, Yoshiyuki Muranaka, Sadao Hashimoto
  • Method of treating hyperlipidemia and inflammation with sulfonate derivatives
    Patent number: 4411911
    Abstract: Novel sulfonate derivatives represented by the formulaR.sub.1 SO.sub.3 CH.sub.2 CO(CH.sub.2).sub.n R.sub.2act to inhibit esterases and chymotripsin and are useful as antilipemic agents, anti-inflammatory agents, immunity controlling agents, etc.
    Type: Grant
    Filed: January 19, 1981
    Date of Patent: October 25, 1983
    Assignee: Taiho Pharmaceutical Company, Limited
    Inventors: Setsuro Fujii, Toshihiro Hamakawa, Kazuo Ogawa, Yoshiyuki Muranaka, Sadao Hashimoto
  • Oral antilipemic agents
    Patent number: 4232007
    Abstract: An oral antilipemic agent comprising a pharmaceutically effective amount of at least one of acidic polyamino acids having a molecular weight of 10,000 to 100,000 and pharmaceutically acceptable salts thereof, and an adjuvant.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: November 4, 1980
    Assignee: Taiho Pharmaceutical Company Ltd.
    Inventors: Motoyoshi Kajihara, Toshihiro Hamakawa, Toshiaki Shibata, Takashi Suzue, Setsuro Fujii