Drug – bio-affecting and body treating compositions – Designated organic active ingredient containing – Having -c- – wherein x is chalcogen – bonded directly to...
Reexamination Certificate
2005-07-12
2005-07-12
Tsang, Cecilia J. (Department: 1625)
Drug, bio-affecting and body treating compositions
Designated organic active ingredient containing
Having -c-, wherein x is chalcogen, bonded directly to...
C514S460000, C549S362000, C549S416000
Reexamination Certificate
active
06916844
ABSTRACT:
The present invention provides hydroxy pyranone derivatives and a method for preparing the hydroxy pyranone derivatives. The hydroxy pyranone derivatives of the present invention are significantly effective in promoting the biosynthesis of collagen and in inhibiting the activity of collagenase, i.e. an enzyme for decomposing collagen, to have anti-wrinkle efficacy, and can be incorporated into medicines or external applications for lessening skin-wrinkles.
REFERENCES:
patent: 5523421 (1996-06-01), Yang et al.
Chang Ih Seop
Kim Bae Hwan
Kim Duck Hee
Kim Su Nam
Lee Hae Kwang
Amorepacific Corporation
Covington Raymond
Nixon & Vanderhye P.C.
Tsang Cecilia J.
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