Patents by Inventor Yuki Yamase

Yuki Yamase 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).

  • External preparation for skin
    Patent number: 5690914
    Abstract: An external preparation for skin including one or more than two types of tranexamic acid derivatives represented by the following general formula (A). GENERAL FORMULA (A) ##STR1## (In the formula (A), R.sub.1, R.sub.2 and R.sub.3 represents hydrogen atoms or substituents and at least one of these is the substituent.) The external preparation for skin including the derivatives have excellent depigmentation effect as well as skin care effect.
    Type: Grant
    Filed: August 27, 1993
    Date of Patent: November 25, 1997
    Assignee: Shiseido Co., Ltd
    Inventors: Masaru Suetsugu, Manami Ohnuma, Yoshihiro Morikawa, Yuki Yamase, Naoe Akiyama, Kenji Kitamura
  • External preparation for skin
    Patent number: 5580549
    Abstract: An external preparing for skin comprising one or more than two types of 2-hydroxy benzoic acid derivative and/or salt thereof represented by the following formula: ##STR1## wherein R is an alkoxy group or alkyl group in the formula. The external preparation for the skin according to the present invention has a suppression effect on melanine generation by inhibition of tyrosinase activity. Accordingly, an excellent bleaching effect based upon the suppression of chromatosis and a high degree of safety can be obtained.
    Type: Grant
    Filed: March 16, 1995
    Date of Patent: December 3, 1996
    Assignee: Shiseido Co., Ltd.
    Inventors: Minoru Fukuda, Masako Naganuma, Yuki Yamase, Yoshihiro Yokokawa, Hisayuki Komasaki