Patents by Inventor Takuji Takeuchi

Takuji Takeuchi 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).

  • Melanocyte-stimulating hormone inhibitor and external preparation containing the same
    Patent number: 5126327
    Abstract: A melanocyte-stimulating hormone inhibitor has an amino acid sequence represented by the following formula [I], [II] or [III] in the molecule:--His--Ser--Arg--Trp-- [I]--Trp--Arg--Ser--His-- [II]--Leu--Ala--Cys--Ala--Arg-- [III]wherein His, Ser, Arg, Trp, Leu, Ala and Cys represent L-- or D-histidine, serine, arginine, tryptophan, leucine, alanine and cysteine residues, respectively. The melanocyte-stimulating hormone inhibitor and an external preparation to be applied to the skin which contains the inhibitor prevent or cure the symptoms of chloasmata and freckles caused by an excess production of melanin by enhanced melanocyte function.
    Type: Grant
    Filed: March 22, 1990
    Date of Patent: June 30, 1992
    Assignee: Lion Corporation
    Inventors: Takuji Takeuchi, Chikara Sato, Kenkichi Oba, Keikichi Sugiyama