Hydroxamic acid derivatives and the preparation method thereof

Details Hydroxamic acid derivatives and the preparation method thereof Hydroxamic acid derivatives and the preparation method thereof

2006-03-21

2009-02-03

Puttlitz, Karl J (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Hydroxamic acids, chalcogen analogs or salts thereof

C562S622000, C514S575000

Reexamination Certificate

active

07485750

ABSTRACT:
The present invention provides hydroxamic acid derivatives represented by the formula, having antioxidation, collagen biosynthesis promotion and skin pore contraction effects, and a method for preparation thereof. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula as an active ingredient.

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patent: 7282522 (2007-10-01), Rho et al.
patent: 2002/0172967 (2002-11-01), Gadek et al.
patent: 2005/019162 (2005-03-01), None
International Search Report dated Jul. 7, 2006.

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