Patents by Inventor Mayumi Tsuchiya

Mayumi Tsuchiya 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).

  • Guanidine derivatives and process for their production
    Patent number: 6187955
    Abstract: A guanidine derivative represented by formula (1), (2), (3) or its acid addition salt and a production process thereof wherein each of A and B is a C2-C8 alkylene, D is a single bond, —CO— or a C1-C6 alkylene, E is H, a lower alkyl or the like, m is 1 to 6, n is 0 to 6 and R1 is H, a lower alkyl or the like, 1 is 1 to 10 and G is H, —OH or the like and a skin cosmetic containing the same. It can exert excellent keratin layer softening effect continuously for a long period of time.
    Type: Grant
    Filed: November 6, 1997
    Date of Patent: February 13, 2001
    Assignee: Kao Corporation
    Inventors: Minoru Nagai, Hiromitsu Kawada, Mayumi Tsuchiya, Seiji Yamasaki, Akira Yamamuro, Toshiya Ono
  • Cosmetics containing guanidine derivatives
    Patent number: 5723133
    Abstract: A guanidine derivative represented by formula (1), (2), (3) or its acid addition salt and a production process thereof ##STR1## wherein each of A and B is a C.sub.2 -C.sub.8 alkylene, D is a single bond, --CO-- or a C.sub.1 -C.sub.5 alkylene, E is H, a lower alkyl or the like, m is 1 to 6, n is 0 to 6 and R.sup.1 is H, a lower alkyl or the like, l is 1 to 10 and G is H, --OH or the like and a skin cosmetic containing the same. It can exert excellent keratin layer softening effect continuously for a long period of time.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: March 3, 1998
    Assignee: Kao Corporation
    Inventors: Minoru Nagai, Hiromitsu Kawada, Mayumi Tsuchiya, Seiji Yamasaki, Akira Yamamuro, Toshiya Ono