Patent ID: 9545369
Date: 2017-01-17
CPC Classifications: A45D,A61K,A61P,A61Q,C07K

Claim:
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 6 kDa to about 16 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.