Patent 9795659 was granted and assigned to Cadila Pharmaceuticals on October, 2017 by the United States Patent and Trademark Office.
This invention discloses the process for lyophilization of the treated cells which comprises the use of a solution containing Trehalose along with amphipathic polymer Polyvinylpyrrolidone. Further the invention discloses the process treating cancer cells, freezing, lyophilizing and reconstituting. Immunomodulator treated dead, but intact cancerous cells were recovered, which can subsequently be used for cancer immunotherapy.