Drug – bio-affecting and body treating compositions – Topical sun or radiation screening – or tanning preparations
Reexamination Certificate
2007-10-02
2007-10-02
Dodson, Shelley A. (Department: 1616)
Drug, bio-affecting and body treating compositions
Topical sun or radiation screening, or tanning preparations
C060S400000, C060S401000
Reexamination Certificate
active
10744365
ABSTRACT:
There is provided a photostable and synergistically enhanced topical sunscreen composition that provides increased substantivity, waterproofness, sweat resistance and rub off resistance. There is further provided methods of enhancing the photostability of a sunscreen active in a topical sunscreen composition, synergistically enhancing the UV absorbance of a topical sunscreen composition having a sunscreen active, and enhancing the substantivity, waterproofness, sweat resistance and rub off resistance in a topical sunscreen composition. The preferred compositions and methods have a sunscreen active, a cosmetically acceptable vehicle, and novel 2-substituted-3,3-diaryl-2-propenoic acid derivatives with [A] a C16to C50straight or branched chain, substituted or un-substituted, conjugated or non-conjugated hydrocarbon, or [B] a siloxane, polysiloxane, organo-modified polysiloxane residue, a group represented by the formula R10[Si(R10)2]n— and R11which is a silicone residue derived from a silicone represented by the formula R11OH having a molecular weight up to about 30,000, wherein each R10is independently selected from the group consisting of alkyl, alkoxy, aryl and aryloxy and n is from 1 to about 500.
REFERENCES:
patent: 5827509 (1998-10-01), Richard et al.
Anderson Glen T.
Gonzalez Anthony D.
Kalafsky Robert E.
Pechko Andrew H.
Avon Products Inc.
Dodson Shelley A.
Ohlandt Greeley Ruggiero & Perle L.L.P.
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