Patents by Inventor Hirohide Takayama

Hirohide Takayama 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).

  • Compounds of allantoin with basic amino acids
    Patent number: 4038287
    Abstract: Compounds of allantoin with basic amino acids have a solubility which is from about 25 to 50 times greater than that of pure allantoin. The compounds have almost the same pharmacological effects as allantoin and the basic amino acids and they are harmless. The compounds can be used in medicines, cosmetics, creams and ointments.
    Type: Grant
    Filed: April 12, 1976
    Date of Patent: July 26, 1977
    Assignee: Kawaken Fine Chemicals Co., Ltd.
    Inventors: Hirohide Takayama, Kiyoshi Niino, Sigeo Fukuda
  • Allantoin compound with a metal salt of 2-pyrrolidone-5-carboxylic acid
    Patent number: 4025525
    Abstract: Allantoin compound with a metal salt of 2-pyrrolidone-5-carboxylic acid has a solubility which is from 2.5 to 4 times greater than that of pure allantoin. The compound has almost the same pharmacological effect as allantoin itself and is harmless, and therefore it can be used in medicines, cosmetics, creams, ointments, etc.
    Type: Grant
    Filed: September 16, 1975
    Date of Patent: May 24, 1977
    Assignee: Kawaken Fine Chemicals Co., Ltd.
    Inventors: Hirohide Takayama, Ippei Yoshimura