Depigmentation agents

Details Depigmentation agents Depigmentation agents

2004-01-28

2008-03-04

Pryor, Alton (Department: 1616)

Drug, bio-affecting and body treating compositions

Designated organic active ingredient containing

C-o-group doai

C514S730000, C514S731000

Reexamination Certificate

active

07338979

ABSTRACT:
The present invention is directed to 4-cyclopentyl resorcinol monohydrate, its Form I polymorph, formulations containing at least one of these compounds, and their use to lighten skin.

REFERENCES:
patent: 6132740 (2000-10-01), Hu
patent: 2004/0235963 (2004-11-01), Gattrell
patent: 1134207 (2001-09-01), None
Yusupov et al., “Reaction of resorcinol and its methyl esters with cyclopentene and cyclohexene”, Uzbek Chemical Journal, vol. 14, No. 5, 1970, pp. 66-69 (Chem. Abstract and English translation attached).
Ardurasuleva et al., “Cyclopentylation of resorcinol and its esters”, Uzbek Chemical Journal, vol. 12, No. 5, 1968, pp. 37-41 (Chem. Abstract and English translation attached).
Yusupov et al., “Cycloalkylation of resorcinol and its esters”, Uzbek SSR Academy of Sciences, vol. 27, No. 6, 1970, pp. 38-39 (Chem. Abstract and English translation attached).
Baek, “A Simple One-Step Alkylation of Orcinol Derivatives”, Bull. Korean Chem. Soc., vol. 9, No. 2, 1988, pp. 71-77.

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