Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Reexamination Certificate
2003-02-04
2009-11-03
Richter, Johann R (Department: 1616)
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
C546S193000, C549S356000, C549S381000
Reexamination Certificate
active
07611696
ABSTRACT:
1,4-dihydropyridine and 1,4-dihydropyrane derivatives and novel cosmetic or dematological sunscreen compositions containing novel and/or known 1,4-dihydropyridine or 1,4-dihydropyrane derivatives which are useful for photoprotecting human skin and/or hair against UV radiation, in particular solar radiation, and the use of such 1,4-dihydropyridine and/or 1,4-dihydropyrane derivatives as UV-A screening agents, particularly in cosmetic and pharmaceutical compositions.
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Klemm, L.H. et al, “Chemistry of Thienopyridines. XXXV. Synthesis, Tautomerism, and Reactions of Quinoline and Thienopyridine Systems Which Bear a 1-Carboethoxy-1-Cyanomethyl Substituent in the Pyridine Ring. Part 2 [1,2],”J. Heterocyclic Chem., vol. 24(5), 1467-72 (1987).
Klemm, L.H. et al., “Chemistry of Thienopyridines. XXXII. Direct Introduction of C-Substituents gamma to the Heteronitrogen Atom in the Thieno[2,3-b]pyridine System,”J. Heterocyclic Chem., vol. 21(4), 1135-40 (1984).
Bryan Cave LLP
DSM IP Assets B.V.
Holt Andriae M
Richter Johann R
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