US Patent 10392177 Insulated shipping container and method of making

An improved insulated shipping container including an external or outer corrugated cardboard box, receiving an inner product box centrally disposed therein. Between the inner and outer cardboard boxes are plural strata or layers of insulating pellets compressed or compacted to a selected degree. Compression of the insulating pellets both interlocks these insulating pellets so as to prevent their migration during transit of the shipping container, and substantially reduces the interstitial space or volume that would otherwise exist among the pellets. The bulk insulating value of the pellets is significantly improved. The entire container is biodegradable, and may be composted.