Patent ID: 9517191
Filing Date: 2016-12-13
CPC Classification: A45D,A61K,A61P,A61Q,C07K

Claim Text:
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 about 17 kDa to about 38 kDa, wherein the fragments have a polydispersity of from about 1.5 to about 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.