Drug – bio-affecting and body treating compositions – Preparations characterized by special physical form – Cosmetic – antiperspirant – dentifrice
Reexamination Certificate
1999-02-11
2001-08-28
Carlson, Karen Cochrane (Department: 1653)
Drug, bio-affecting and body treating compositions
Preparations characterized by special physical form
Cosmetic, antiperspirant, dentifrice
C424S070122, C424S078030, C530S350000, C530S300000
Reexamination Certificate
active
06280747
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a novel cosmetic or dermatological composition containing, as an active substance, at least one natural or recombinant spider silk protein, or an analog of such a protein. More particularly, the present invention relates to compositions in the form of hair products, skincare products, make-up products or antisun products based on a spider silk protein.
2. Discussion of the Background Art
The use of natural or plant proteins is well known and has been widely practiced in the cosmetics field, in particular the use of silk proteins from the insect Bombyx mori, more particularly described in Biomaterials Ed. D. Byrom, Stocktompress, 1-54, (1991). However, these silk proteins do not have good mechanical properties in the form of threads or films and cannot therefore satisfactorily fulfill their functions as film-forming agents.
Spider silk proteins have been characterized by Lucas et al., Adv. Protein Chem. 13:107-242, (1958); Andersen, Comp. Became. Physiol. 35:705-711, (1970); Denny M W, J. Exp. Biol., 65, 483-506, (1976); and Lucas F, Discovery, 25, 20-26, (1964). They are known for their good mechanical and elastic properties.
SUMMARY OF THE INVENTION
It has now been discovered that, in addition to their known properties, spider silk proteins give cosmetic or dermatological compositions unexpected properties, in particular enhancement of the moisturizing or plasticizing effect. Spider silk proteins moreover behave as good water-resistant film-forming agents, and especially have a low surface density.
Accordingly, it is an object of the present invention to provide a cosmetic or dermatological composition containing an effective amount of at least one natural or recombinant spider silk protein, or an analog of such a protein.
Various other objects, features and attendant advantages of the present invention will be more fully appreciated as the same becomes better understood from the following detailed description when considered in connection with the accompanying Figures.
REFERENCES:
patent: 5756677 (1998-05-01), Lewis et al.
Xu et al., 1990. PNAS 87:7120-7124.
Arraudeau Jean-Pierre
Garson Jean-Claude
Philippe Michel
Carlson Karen Cochrane
L'Oreal
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
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