Method of preventing darkening of skin or inhibiting...

Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations

Reexamination Certificate

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C424S060000, C424S400000, C424S401000, C514S474000

Reexamination Certificate

active

06861050

ABSTRACT:
A method of preventing darkening of the skin or inhibiting melanization caused by the irradiation of the melanin monomers with long wavelength ultraviolet rays having a wavelength of 320-400 nm as well as a polymerization inhibitor of a biological dihydroxyindole compound comprising 3-O-ethyl ascorbic acid and an external skin treatment composition containing the same.

REFERENCES:
patent: 4876084 (1989-10-01), Hori et al.
patent: 4981680 (1991-01-01), Hori et al.
patent: 8-134055 (1996-05-01), None
patent: 11-199425 (1999-07-01), None
patent: WO 9409756 (1994-05-01), None
patent: WO 9834591 (1998-08-01), None
Shigeru, “Cosmetic for Preventing Damage by Ultraviolet Ray,” Patent Abstracts of Japan, vol. 1995, No. 06, Jul. 31, 1995, JP 07-082134, Mar. 28, 1995, Abstract.
Tomoko, “Skin-Beautifying Cosmetic,” Patent Abstracts of Japan, vol. 017, No. 644, Nov. 30, 1993, JP 05-201847; Aug. 10, 1993, Abstract.
Database WPI, Section Ch, Week 200165, Derwent Publications Ltd., KR 2001 027 466, Apr. 6, 2001, Abstract, XP-002249722.

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