Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – At least one aryl ring which is part of a fused or bridged...
Reexamination Certificate
2007-08-14
2007-08-14
Smith, Duane (Department: 1724)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
At least one aryl ring which is part of a fused or bridged...
C524S502000, C424S448000, C424S449000, C424S405000, C514S058000, C514S944000, C514S946000, C604S892100, C604S892100, C604S892100, C604S890100
Reexamination Certificate
active
10948763
ABSTRACT:
The present invention is directed to a hybridized polymer matrix, a method of making such, and products incorporating such a matrix. The hybridized polymer matrix comprises a solvent-free polymer matrix base, a hybridized matrix comprising one or more poly(1-vinyl-2-pyrrolidones) and dimethyl sulfoxide, and at least one active substance. The hybridized polymer matrix is useful in the preparation of transdermal therapeutic systems, particularly making possible the introduction of pharmaceutically active substances which are otherwise difficult to dissolve, such as ibuprofen, into a non-polar matrix.
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Gäde Christian
Nierle Jens
Beiersdorf AG
Greenblum & Bernstein P.L.C.
Smith Duane
Wu Ives
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