Patents by Inventor Shigeki Hatakeyama

Shigeki Hatakeyama 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).

  • Isoquinoline derivatives for the treatment of glaucoma or ocular hypertension
    Patent number: 5252583
    Abstract: The use of isoquinoline derivatives for the treatment of glaucoma or ocular hypertension. The isoquinoline derivatives are of formula I ##STR1## wherein R.sub.1 is a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group and R.sub.2 is a C.sub.1 -C.sub.6 alkyl group. The stability of the isoquinoline derivatives when used in the form of a solution is improved by incorporating therein compounds having a phenolic hydroxyl group and/or glycols serving as a stabilizer.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: October 12, 1993
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Toyohiro Tadokoro, Kiyoshi Sato, Shigeki Hatakeyama, Shigeo Kawase, Masao Ueno
  • Isoquinoline composition for the treatment of glaucoma or ocular hypertension
    Patent number: 5061714
    Abstract: The use of isoquinoline derivatives for the treatment of glaucoma or ocular hypertension. The isoquinoline derivatives are of formula I ##STR1## wherein R.sub.1 is a hydrogen or a C.sub.1 -C.sub.6 alkyl group and R.sub.2 is a C.sub.1 -C.sub.6 alkyl group. The stability of the isoquinoline derivatives when used in the form of a solution is improved by incorporating therein compounds having a phenolic hydroxyl group and/or glycols serving as a stabilizer.
    Type: Grant
    Filed: March 4, 1991
    Date of Patent: October 29, 1991
    Assignee: Nisshin Flour Milling Co., Ltd.
    Inventors: Toyohiro Tadokoro, Kiyoshi Sato, Shigeki Hatakeyama, Shigeo Kawase, Masao Ueno