Patents by Inventor Keiichiro Ishida

Keiichiro Ishida 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).

  • Anti-sunburn skin-care preparation
    Patent number: 5141741
    Abstract: A novel anti-sunburn skin-care preparation, such as creams, foundations, milky lotions and the like, is proposed which contains, as the ultraviolet-absorbing and -shielding ingredient, a salt of ellagic acid with a polyvalent metal, e.g., calcium, barium and magnesium. The skin-care preparation is free from the problem of irritation and sensitization of human skin and exhibits excellent anti-sunburn effect with durability.
    Type: Grant
    Filed: December 4, 1989
    Date of Patent: August 25, 1992
    Assignee: Lion Corporation
    Inventors: Keiichiro Ishida, Yoshimi Sato, Makoto Egawa, Keiji Takeuchi
  • Agent containing an ellagic acid series compound for external application and use thereof
    Patent number: 5073545
    Abstract: Agents for external application contain as an effective component ellagic acid series compounds represented by the general formula [I] or salts thereof: ##STR1## wherein R.sub.1 to R.sub.4 are a hydrogen atom, an alkyl group having 1 to 20 carbon atoms, an alkoxy group having 1 to 20 carbon atoms, a polyalkylene oxide residue where the alkylene oxide unit has 2 to 3 carbon atoms, or a sugar residue represented by the formula [II]: ##STR2## and R.sub.5 is a hydrogen atom, a hydroxyl group or an alkoxy group having 1 to 8 carbon atoms.
    Type: Grant
    Filed: June 6, 1988
    Date of Patent: December 17, 1991
    Assignee: Lion Corporation
    Inventors: Masatoshi Arima, Hiroaki Nishizawa, Keiji Takeuchi, Hiroshi Deura, Keiichiro Ishida