Patent ID: 9187538
Filing Date: 2015-11-17
Classification: A45D,A61K,A61P,A61Q,C07K

Abstract:
1. A composition comprising: pure silk fibroin-based protein fragments having about 0.01% (w/w) to about 10% (w/w) sericin, wherein the fragments have an average weight average molecular weight ranging from 17 kDa to 38 kDa; wherein the fragments have a polydispersity of between 1.5 and 3.0; wherein the composition is substantially homogeneous; wherein the composition includes between 0 ppm to 500 ppm of inorganic residuals; wherein the composition includes between 0 ppm to 500 ppm of organic residuals; and wherein the composition does not spontaneously or gradually gelate and does not visibly change in color or turbidity when in a solution for at least 10 days.